Chapter 17

Explain how the human X and Y chromosomes can pair during meiosis even though they are of different lengths and most of their genes ate different.

Describe the biological basis for the 1: 1 ratio of males and females at conception in mammals.

Explain why linked genes do not exhibit independent assortment

Describe how recombination frequency can be used to build a genetic map.

Describe the pattern of inheritance expected from a Y-linked gene in a human pedigree.

Describe the pattern of inheritance expected from a gene present in mitochondrial DNA in a human pedigree.

Explain how Y-Chromosome and mitochondrial DNA data can be used to trace ancestry.