DNA Profiling and Gene Therapy Techniques

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Questions and Answers

Which of the following techniques are used in DNA profiling?

  • PCR
  • Short Tandem Repeat analysis
  • Gel Electrophoresis
  • All of the above (correct)

The polymerase chain reaction (PCR) is a technique that amplifies a specific DNA segment.

True (A)

What is the primary goal of human gene therapy?

To correct diseases by introducing new genes into affected individuals.

The technique used to separate DNA fragments by size is called ______.

<p>Gel Electrophoresis</p> Signup and view all the answers

Gene therapy is a universally successful treatment for all genetic diseases.

<p>False (B)</p> Signup and view all the answers

Match the following terms with their correct definitions:

<p>PCR = A technique for amplifying a specific DNA segment STR analysis = Analyzes repeating DNA sequences to create a profile Gel Electrophoresis = Separates DNA fragments by size and charge Gene therapy = Aims to correct diseases by introducing new genes.</p> Signup and view all the answers

Why are bone marrow cells considered ideal targets for gene therapy?

<p>They contain stem cells that give rise to all blood cell types and multiply throughout the lifespan.</p> Signup and view all the answers

Which of the following is NOT a step involved in DNA profiling?

<p>Transcribing and translating the new gene in the patient's body (D)</p> Signup and view all the answers

What is the primary method used to separate DNA fragments by size in STR analysis?

<p>Gel electrophoresis (A)</p> Signup and view all the answers

In STR analysis, shorter DNA fragments move slower through the gel compared to longer fragments.

<p>False (B)</p> Signup and view all the answers

What are the repeating units in STR sites, and what is their typical length in nucleotides?

<p>The repeating units in STR sites are short tandem repeats, typically four nucleotides long.</p> Signup and view all the answers

The ______ is a database that stores STR profiles for forensic purposes.

<p>CODIS (Combined DNA Index System)</p> Signup and view all the answers

Which of these factors contributes to the movement of DNA fragments during gel electrophoresis?

<p>All of the above (D)</p> Signup and view all the answers

Match the following terms to their descriptions:

<p>PCR = A technique used to amplify specific regions of DNA Gel electrophoresis = A method for separating molecules based on size and charge STR = Short tandem repeat sequences with variable lengths CODIS = A database used for storing and comparing STR profiles</p> Signup and view all the answers

The DNA profiling technique used in the Earl Washington case is based on the analysis of STR (Short Tandem Repeats) variations.

<p>True (A)</p> Signup and view all the answers

Which of the following is NOT a potential application of DNA profiling?

<p>Predicting future diseases (D)</p> Signup and view all the answers

The high-throughput DNA sequencing machine shown in Figure 12.19 can process _____ bases in a 10-hour run.

<p>half a billion</p> Signup and view all the answers

What is the primary goal of bioinformatics?

<p>To store and analyze biological data, especially DNA sequences, using computational methods.</p> Signup and view all the answers

Match the following individuals with their respective roles in the applications of DNA technology:

<p>Earl Washington = Exonerated by DNA profiling Kenneth Tinsley = Pleaded guilty to the crime after DNA profiling Osama bin Laden = Identified through DNA profiling Marie Antoinette = Subject of historical DNA analysis Thomas Jefferson = Historical paternity case involving DNA analysis</p> Signup and view all the answers

What is the primary method used to sequence entire genomes?

<p>Whole-genome shotgun method (D)</p> Signup and view all the answers

The Human Genome Project was completed in 2003 with 99.999% accuracy.

<p>False (B)</p> Signup and view all the answers

What is the name of the public database that stores sequenced DNA data?

<p>GenBank</p> Signup and view all the answers

The human genome includes approximately ______ nucleotide pairs.

<p>3 billion</p> Signup and view all the answers

Match the following scientists with their contributions to DNA sequencing:

<p>Frederick Sanger = Developed the Sanger sequencing method Craig Venter = Led the Celera Genomics effort to sequence the human genome Walter Gilbert = Developed a chemical method for DNA sequencing</p> Signup and view all the answers

Which of the following organisms was the first to have its complete genome sequenced?

<p>Haemophilus influenzae (A)</p> Signup and view all the answers

The size of an organism's genome is directly proportional to its complexity.

<p>False (B)</p> Signup and view all the answers

What is a key application of genome sequencing in the field of medicine?

<p>Cancer research</p> Signup and view all the answers

The human genome includes approximately ______ genes.

<p>21,000</p> Signup and view all the answers

Which of the following techniques involves passing single DNA strands through a nanopore?

<p>Nanopore sequencing (D)</p> Signup and view all the answers

What is the primary focus of genomics?

<p>Analyzing the complete set of genes and their interactions (C)</p> Signup and view all the answers

Proteomics studies the full set of RNA molecules produced by a cell.

<p>False (B)</p> Signup and view all the answers

What is metagenomics and how is it applied?

<p>Metagenomics is the study of genetic material from environmental samples. It involves sequencing DNA from mixed populations, such as microbial communities, to identify and analyze the organisms present. This has applications in understanding microbial diversity and ecosystem function.</p> Signup and view all the answers

Systems biology relies heavily on ______ and bioinformatics tools to model the dynamics of biological systems.

<p>advanced computer technology</p> Signup and view all the answers

Match the following terms with their related fields:

<p>Genomics = Study of whole sets of genes and their interactions Proteomics = Study of the complete set of proteins encoded by a genome Metagenomics = Study of DNA from environmental samples Systems biology = Modeling the dynamics of biological systems by analyzing interactions between their parts</p> Signup and view all the answers

Which of these is NOT a concern related to the use of genetically modified crops?

<p>Reduced nutritional value in GM crops compared to non-GM counterparts (B)</p> Signup and view all the answers

The European Union (EU) has wholeheartedly embraced the widespread adoption of genetically modified crops.

<p>False (B)</p> Signup and view all the answers

Describe two specific examples of safety measures used to minimize risks associated with DNA technology.

<p>Two examples of safety measures are: 1. Implementing stringent laboratory procedures to prevent researcher infection and accidental release of engineered microorganisms. 2. Genetically crippling strains used in experiments to limit their survival outside the laboratory environment.</p> Signup and view all the answers

Which of the following is NOT a type of non-coding DNA found in the human genome?

<p>Introns (B)</p> Signup and view all the answers

The sequencing of the Neanderthal genome revealed no evidence of interbreeding with modern humans.

<p>False (B)</p> Signup and view all the answers

What is the primary function of the genes inherited from Neanderthals that influence keratin production?

<p>These genes affect hair, nails, and skin development.</p> Signup and view all the answers

Behcet's disease, a painful illness, is prevalent among individuals who live along the ancient ______.

<p>Silk Road</p> Signup and view all the answers

Match the following terms related to the human genome with their correct descriptions:

<p>Genome = The complete set of genetic instructions in an organism DNA = The molecule containing genetic instructions Gene = A unit of heredity that determines a particular trait Promoter = A regulatory region on DNA that initiates transcription Enhancer = A regulatory region on DNA that increases transcription microRNA = Small RNA molecules involved in gene regulation</p> Signup and view all the answers

The cost and time required for genome sequencing have significantly increased over the years.

<p>False (B)</p> Signup and view all the answers

What evidence suggests that Neanderthals and modern humans interbred?

<p>The comparison of the Neanderthal genome to modern human genomes revealed shared genetic material.</p> Signup and view all the answers

Which of the following statements is TRUE about Behcet's disease?

<p>It is linked to the immune system's ability to fight infections. (C)</p> Signup and view all the answers

Genetically modified (GM) plants can potentially contribute to the creation of 'superweeds', which are resistant to herbicides, diseases, or insect pests.

<p>True (A)</p> Signup and view all the answers

Which of the following is NOT a potential ethical concern raised by human DNA technologies?

<p>The development of new vaccines for infectious diseases (B)</p> Signup and view all the answers

What is a potential concern regarding the widespread use of GM seeds?

<p>Reduced natural genetic diversity and increased vulnerability to sudden environmental changes or new pests.</p> Signup and view all the answers

The Y chromosome, passed relatively unchanged from father to son, allows researchers to trace the ancestry of _____.

<p>human males</p> Signup and view all the answers

Match the following human DNA technology applications with their corresponding ethical concerns.

<p>Gene therapy = Tampering with human genes Genetic profiling = Privacy concerns Human growth hormone production = Access and equity concerns Genetic engineering of gametes and zygotes = Potential for designer babies</p> Signup and view all the answers

Which of the following statements about the Y chromosome is TRUE?

<p>The Y chromosome is responsible for determining a person's sex. (A), The Y chromosome does not undergo recombination during meiosis. (B)</p> Signup and view all the answers

Genetic studies suggest that a significant proportion of men in central Asia share a common ancestor, potentially linking them to Genghis Khan.

<p>True (A)</p> Signup and view all the answers

What is the primary concern regarding the use of DNA profiling for crime solving?

<p>The potential for sacrificing genetic privacy for security purposes.</p> Signup and view all the answers

What is the primary purpose of genetic engineering?

<p>To study and modify genetic material (B)</p> Signup and view all the answers

The first exploration of genetic engineering was through modern cloning techniques.

<p>False (B)</p> Signup and view all the answers

What role do plasmids play in genetic engineering?

<p>They serve as tools to carry genes and replicate them.</p> Signup and view all the answers

The process of creating multiple copies of a gene is known as __________.

<p>gene cloning</p> Signup and view all the answers

Match the following components with their respective roles in genetic engineering:

<p>Restriction enzymes = Cut DNA at specific locations Bacterial plasmids = Carry and replicate genes Transgenic organisms = Contain genes from different species Gene cloning = Making multiple copies of a gene</p> Signup and view all the answers

Which organism is commonly used as a workhorse in genetic engineering?

<p>Escherichia coli (B)</p> Signup and view all the answers

Gene transfer can only occur within the same species.

<p>False (B)</p> Signup and view all the answers

What is recombinant DNA?

<p>DNA formed by combining DNA from different sources.</p> Signup and view all the answers

What is the primary purpose of using genetically modified organisms in agriculture?

<p>To enhance agricultural productivity (B)</p> Signup and view all the answers

Genetically engineered human growth hormone (HGH) is effective for treating HGH deficiency in humans.

<p>True (A)</p> Signup and view all the answers

Name one crop that has been genetically modified to increase its nutritional value.

<p>Golden Rice 2</p> Signup and view all the answers

Genetically modified corn is resistant to the ____________, which reduces the need for chemical insecticides.

<p>European corn borer</p> Signup and view all the answers

Which genetically modified animal grows twice as large and reaches market size in half the normal time?

<p>Faster-growing salmon (C)</p> Signup and view all the answers

Match the genetically modified crops with their respective benefits:

<p>Golden Rice 2 = Prevents vitamin A deficiency Insect-Resistant Corn = Reduces need for chemical insecticides Salt-Tolerant Rice = Grows in high-salinity conditions Cold-Resistant Strawberries = Resists cold weather</p> Signup and view all the answers

Bacteria are more difficult to manipulate than yeast for genetic modifications.

<p>False (B)</p> Signup and view all the answers

What type of proteins can yeast be modified to produce?

<p>Human proteins</p> Signup and view all the answers

What is the primary function of restriction enzymes?

<p>To cut DNA at specific sequences (C)</p> Signup and view all the answers

CRISPR-Cas9 can only recognize one specific DNA sequence.

<p>False (B)</p> Signup and view all the answers

What is Humulin?

<p>Human insulin produced by genetically modified bacteria</p> Signup and view all the answers

The _____ enzyme is responsible for joining DNA fragments together after they have been cut.

<p>DNA ligase</p> Signup and view all the answers

Which of the following best describes the process of gene editing using CRISPR-Cas9?

<p>Directly editing the DNA sequence by cutting and replacing it (A)</p> Signup and view all the answers

Insulin from cows or pigs was a preferred choice for diabetes treatment due to its effectiveness and low allergenicity.

<p>False (B)</p> Signup and view all the answers

Cas9 operates like a _____, guided by the complementary RNA to pinpoint and cut target DNA.

<p>guided missile</p> Signup and view all the answers

What role do guide RNA molecules play in the CRISPR-Cas9 system?

<p>They ensure Cas9 cuts the DNA at the correct target sequence.</p> Signup and view all the answers

What specific sequence does one restriction enzyme recognize?

<p>GAATTC (D)</p> Signup and view all the answers

Flashcards

Genetic Engineering

Technology for modifying genetic material in organisms.

GM Organisms

Organisms whose genes have been modified using genetic engineering.

Recombinant DNA

DNA formed by combining DNA from different sources.

Bacterial Plasmids

Circular DNA molecules in bacteria that can replicate independently.

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Gene Cloning

The process of creating multiple copies of a gene.

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Restriction Enzymes

Proteins that cut DNA at specific sequences.

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Transgenic Organisms

Organisms that contain genes from other species.

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DNA Cloning

Making many identical copies of a specific DNA segment.

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DNA Profiling

A method used to identify individuals based on their DNA characteristics.

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Polymerase Chain Reaction (PCR)

A technique to amplify a specific DNA segment from small samples.

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Gel Electrophoresis

A process used to separate DNA fragments by size for analysis.

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Short Tandem Repeat (STR)

Repeats of short DNA sequences used in DNA profiling.

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Gene Therapy

Treatment method aiming to correct genetic diseases by introducing new genes.

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Bone Marrow Cells

Stem cells in the bone marrow that can generate all blood cell types.

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Amplifying DNA

Creating sufficient quantities of DNA from small samples for analysis.

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Comparing DNA Fragments

Analyzing DNA sequences to determine similarities or differences between samples.

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Restriction Sites

Specific short DNA sequences recognized by restriction enzymes.

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Sticky Ends

Single-stranded ends of DNA fragments after cuts that can pair with others.

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CRISPR-Cas9

A DNA editing technology that cuts specific genes in living cells.

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Cas9

A protein that cuts double-stranded DNA guided by RNA.

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Guide RNA

RNA that directs the Cas9 protein to the target DNA sequence.

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Gene Knockout

Disabling a gene to study its function by observing changes.

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Humulin

Human insulin produced using genetically modified bacteria.

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Recombinant DNA Technology

Techniques used to manipulate and produce recombinant DNA.

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STR Analysis

A DNA profiling method comparing lengths of STR sequences in the genome.

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PCR Amplification

Process of amplifying DNA regions containing STR sites.

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DNA Movement in Gel

Negatively charged DNA moves toward the positive electrode in gel electrophoresis.

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STR Sites

Locations in the genome with repeating four-nucleotide sequences.

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CODIS

Combined DNA Index System storing DNA profiles from STR analysis.

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Comparing STR Fragments

Different DNA samples are analyzed based on STR fragment sizes.

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STR Repetition Example

Comparison of STR sites reveals differing repetitions in DNA samples.

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Earl Washington Case

A case where STR analysis proved a wrong conviction.

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Bioinformatics

The application of computational methods to analyze biological data.

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Next-Generation Sequencing

A method that sequences millions of DNA fragments simultaneously.

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Forensic DNA Applications

Using DNA profiling in criminal cases and identification.

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High-Throughput Sequencing

Technology allowing rapid sequencing of large amounts of DNA.

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Human Genome Project

A project that mapped the human genome and revealed insights into human evolution.

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Non-coding DNA

Regions of DNA that do not code for proteins but have various functions, including regulation.

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Neanderthal Genome

Sequenced DNA from Neanderthals, showing similarities to modern humans and evidence of interbreeding.

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Behcet's Disease

A painful condition causing inflammation in blood vessels, prevalent in Silk Road populations.

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Genome Sequencing Costs

The expenses and time for sequencing genomes have significantly decreased over the years.

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Keratin Production Genes

Genes inherited from Neanderthals that influence hair, skin, and nails development.

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Evolutionary Relationships

Study of how various species are related through comparative genome analysis.

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Silk Road's Genetic Link

Genetic variations in populations along the Silk Road linked to immune system function and Behcet's disease.

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Whole-Genome Shotgun Method

A technique for sequencing genomes by fragmenting DNA and aligning sequences.

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GenBank

A public database that stores sequenced DNA data from various organisms.

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Nucleotide Pairs in Human Genome

The human genome consists of approximately 3 billion nucleotide pairs across chromosomes.

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Number of Genes in Human Genome

The human genome contains roughly 21,000 genes despite its size.

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Nanopore Sequencing

A method to sequence DNA by passing it through a tiny nanopore identifying bases.

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Genome Sequencing Applications

Used in cancer research and understanding human genetics and evolution.

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Haemophilus influenzae

The first complete genome sequenced, marking a milestone in genomics in 1995.

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Genetically Modified Organisms (GMOs)

Organisms whose genetic material has been altered for improved agriculture.

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Yeast in Protein Production

Yeast is used to produce human proteins that are made by eukaryotic cells.

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Genetically Engineered Human Growth Hormone (HGH)

A treatment developed in 1985 for children with growth hormone deficiencies.

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Golden Rice 2

Rice genetically modified to produce beta-carotene, which helps prevent vitamin A deficiency.

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Insect-Resistant Corn

Genetically modified corn that is resistant to the European corn borer insect.

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Faster-Growing Salmon

Genetically modified salmon that grows to market size in half the normal time.

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Cattle without Horns

Genetically modified cows that lack horns, reducing dehorning needs.

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DNA Technology in CDC

CDC uses DNA tech to identify pathogens causing food poisoning accurately.

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Genomics

The study of entire gene sets and their interactions across species.

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Metagenomics

Examination of genetic material from environmental samples to study microbial communities.

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Proteomics

The study of all full protein sets encoded by genomes.

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Systems Biology

Models biological systems dynamics through interactions among their parts using bioinformatics.

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Safety Guidelines in DNA Technology

Regulations to prevent the creation of hazardous organisms and laboratory infections.

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Genetically Modified (GM) Crops

Crops with altered genes to improve yield and profitability, common in several countries.

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Controversy over GM Foods

Public debate regarding the safety and environmental impact of genetically modified foods.

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Bioinformatics Tools

Computer software that helps sort and analyze genetic data for genomics studies.

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Transgenic Plants

Plants that have been genetically modified to carry genes from other species.

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Superweeds

Weeds that develop resistance to herbicides due to genetic modifications.

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Gene Escape

The process where genetically modified genes spread to wild relatives.

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Human Growth Hormone (HGH)

A hormone that can be produced by genetically engineered cells for medical treatment.

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Genetic Privacy

Concerns about how DNA information is collected and used.

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Y Chromosome Studies

Research tracing male lineage through the Y chromosome.

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Niall of the Nine Hostages

An ancestor traced back through Y chromosome studies in Irish men.

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Gene Therapy Ethics

The ethical considerations around altering human genes for medical purposes.

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