Meiosis and genetic variation Quiz
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5 questions, one answer each
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1. A gene is found at the same position on both chromosomes of a homologous pair. What is this position called?
- A. Allele
- B. Locus
- C. Chromatid
- D. Centromere
2. A woman is a carrier of an X-linked recessive condition and her partner is unaffected. What proportion of their sons is expected to be affected?
- A. None
- B. One quarter
- C. One half
- D. All
3. A test cross between a double heterozygote and a double recessive gives mostly parental phenotypes. What does this suggest?
- A. The genes are on different chromosomes
- B. The genes are linked on the same chromosome
- C. The genes are sex linked
- D. The cross has no recombination
4. Which process in meiosis exchanges alleles between chromatids of homologous chromosomes?
- A. Independent assortment
- B. Crossing over
- C. Replication
- D. Cytokinesis
5. An organism has 5 pairs of homologous chromosomes. How many combinations of chromosomes can independent assortment alone produce in its gametes?
- A. 10
- B. 25
- C. 32
- D. 120