Chapter 11, Problem 19RQ

Why do unrelated children with a disorder such as Down syndrome resemble each other more closely than they do their siblings?

What is a carrier of a genetic trait?

What is independent assortment? Does independent assortment occur during mitosis or during meiosis?

Define genetic variance.

Describe the chromosomal alterations and phenotype of cri du chat syndrome and Prader-Willi syndrome.

Can a male be a carrier of red-green color blindness?

List and briefly describe the three processes that lead to variation in offspring with the same parents.

What is probability, and how is it applied in genetic analysis?

Why is it more efficient to perform a test cross with a homozygous recessive donor than a homozygous dominant donor? How could the same information still he found with a homozygous dominant donor?