Genetics: Traits and Chromosomes
20 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the definition of a gene?

  • A segment of DNA that determines a trait (correct)
  • A segment of RNA that determines a trait
  • A pair of chromosomes that determines a trait
  • A protein that determines a trait

What is the genotype for an organism with two dominant genes?

  • Tt
  • TT (correct)
  • tt
  • AA

What do homologous pairs of chromosomes consist of?

  • Two recessive genes from different parents
  • Two different genes from the same parent
  • Dominant and recessive genes from the same parent
  • Matching genes, one from each parent (correct)

What does DNA stand for?

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

What is the term for a segment of DNA that determines a trait?

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

Which type of genes prevent other genes from showing their traits?

<p>Dominant genes (C)</p> Signup and view all the answers

What is the term used for the physical appearance resulting from an organism's gene makeup?

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

Who described DNA as a double helix or twisted ladder and won the Nobel Prize for it?

<p>Frances Crick (C)</p> Signup and view all the answers

What is the term for a combination of genes in an organism?

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

What is the term for genes that do not show their traits even though they are present?

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

What is the role of the sugar-phosphate backbones in DNA replication and stability?

<p>Provide a stable structure for the DNA double helix (A)</p> Signup and view all the answers

Which statement describes the polarity of the DNA strands?

<p>One strand runs 3’ to 5’ and the other runs 5’ to 3’ (A)</p> Signup and view all the answers

What is the function of DNA polymerase during DNA replication?

<p>Adds nucleotides to the new DNA strands according to base-pairing rules (D)</p> Signup and view all the answers

Why does DNA replication take place in the nucleus of eukaryotic cells?

<p>The nucleus provides a stable environment for replication (A)</p> Signup and view all the answers

Which statement accurately describes the difference between DNA and RNA?

<p>DNA contains thymine, while RNA contains uracil (C)</p> Signup and view all the answers

What is the role of the enzyme helicase in DNA replication?

<p>Separates the parent DNA strands by breaking hydrogen bonds (D)</p> Signup and view all the answers

What is the significance of Chargaff's rule in DNA structure?

<p>It maintains a 1:1 ratio of pyrimidine and purine bases in DNA (A)</p> Signup and view all the answers

Where does DNA replication occur in prokaryotic cells?

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

What is the function of the enzyme DNA polymerase during replication?

<p>Adds nucleotides according to base-pairing rules to new DNA strands (C)</p> Signup and view all the answers

What is the composition of a DNA nucleotide?

<p>Deoxyribose sugar, phosphate, one of 4 nitrogenous bases [ A T G C ] (C)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser