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Practice problems 1

Practice problems 1 - Practice problems 1 Calico cats have...

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Practice problems 1. Calico cats have patches of black and orange fur, and are heterozygous for the orange and black alleles of a coat color gene. A calico cat named Furball had a father with black fur. What sex chromosome did Furball inherit from its father? Explain your reasoning. Describe the mechanism that results in Furball’s patches of black and orange fur. Much to your surprise, Furball’s karyotype reveals that it is XXY. How would this finding affect the answers to the previous questions? If you know that Furball inherited two X chromosomes from mom, can you predict the fur phenotype of Furball’s mother? 2. DNA polymorphisms on the Y chromosome and on mtDNA have been used extensively to study the history in humans. Describe some of the advantages that these chromosomes have over autosomes for these types of studies. 3. Androgen insensitivity is an X-linked trait that results from the inability to respond to testosterone and dihydroxytestosterone. Describe the karyotypic sex
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