C. Estrella

Biology 4

Chapter 15 (Chromosomal Basis of Inheritance) Learning Objectives

1. Describe sex determination in humans.
2. Describe the inheritance of a sex-linked gene such as color-blindness.
3. Explain why a recessive sex-linked gene is always expressed in human males.
4. Distinguish among nondisjunction, aneuploidy, and polyploidy; explain how these major chromosomal changes occur and describe the consequences.
5. Distinguish between trisomy and triploidy.
6. Distinguish among deletions, duplications, translocations, and inversions on chromosomes.
7. Describe the type of chromosomal alterations implicated in the following human disorders: Down syndrome, Klinefelter syndrome, extra Y, triple-X syndrome, Turner syndrome, and cri du chat syndrome.