Short free response question
1. Female bees are diploid, and male bees are haploid. The haploid males
produce sperm and can successfully mate with diploid females. Fertilized eggs develop into females and unfertilized eggs develop into males. Propose a mechanism for sperm production in male bees, and indicate how it would differ from sperm production in other animals with diploid males.
2. Somatic cells from a horse have 64 chromosomes and those from a donkey have 62 chromosomes. A cross between a female horse and a male donkey produces a mule, which is usually sterile. How many chromosomes do you expect are in the somatic cells of a mule? Propose an explanation for why most mules are sterile.
1 answer
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