Ch. 15 study guide - Why do sex-linked disorders affect...

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STUDY GUIDE BIO 311D CHINNERY SPRING 2007 CHAPTER 15 (lecture 6) Pgs 282-288 Important figures: 15.9a, 15.10, 15.11 Important terms: sex, sex-linked gene, Duchenne muscular dystrophy, hemophilia, hemizygous, X inactivation, barr body, aneuploidy, polyploidy, Down syndrome, Klinefelter syndrome, Turner syndrome, testicular feminization. Knowledge goals : Be able to discuss at least one other chromosomal system of sex determination other than the x-y system. What are sex-linked genes?
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Unformatted text preview: Why do sex-linked disorders affect more males than females? Draw a Punnett square of the transmission of an x-linked trait, first describing the parents and using X and Y as the main genotype letters and A, a as the presence/absence of the trait. What are two sex-linked genetic disorders that we discussed in class? Describe x inactivation. Down syndrome is due to what genetic defect? What can happen if a person receives more than just one x and one y?...
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