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Genetic Alleles Difference Quiz

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Questions and Answers

What is always the difference between the alleles of a gene?

Their position on the chromosome

Their amino acid sequences

The number of codons that each contains

Their base sequence (correct)

What is the difference between autosomes and sex chromosomes?

Autosomes are diploid and sex chromosomes are haploid

Sex chromosomes determine gender and autosomes do not (correct)

Autosomes are not found in gametes but sex chromosomes are

Sex chromosomes are found in animal cells and autosomes are found in plant cells

A parent organism of an unknown genotype is mated in a test cross. Half of the offspring have the same phenotype as the parent. What can be concluded from this result?

The parent is heterozygous for the trait (correct)

The trait being inherited is polygenic

The parent is homozygous dominant for the trait

The parent is homozygous recessive for the trait

A polygenic character is controlled by two genes each with two alleles. How many different possible genotypes are there for this character?

4 (B) Signup and view all the answers

A single gene in humans causes blood to be either rhesus positive (dominant allele) or rhesus negative (recessive allele). A woman with rhesus-negative blood has already had a child with rhesus-positive blood. There could be complications during pregnancy if she has another child with rhesus-positive blood. What is the probability of this, if the father is the same, and if his mother is known to have rhesus-negative blood?

50% (B) Signup and view all the answers

Recombinant DNA Technology_____.

uses bacteria to make copies of the desired product and splices DNAs together (C) Signup and view all the answers

The goal of genetic engineering is to?

modify cells to correct a defect or produce a desired product (D) Signup and view all the answers

Enzymes used to cut genes in recombinant DNA research are _____

Restriction enzymes (B) Signup and view all the answers

Which is true about plasmids?

All of the statements are true about plasmids (D) Signup and view all the answers