Class #1: Advanced Punnett Practice

Example 1: Read the example on Page 1 and do Monohybrid Practice Problems 1-5.

Sex Linked Traits• Play Khan Academy “Sex-linked Traits” (14:18 minutes)

• https://www.khanacademy.org/science/biology/heredity-and-genetics/v/sex-linked-traits

• Read Example 2 on Page 2: Sex-Linked Cross• Do practice problems 6-9

Dihybrid Crosses• Play Khan Academy video starting at 16:20• https://www.khanacademy.org/science/biolog

y/heredity-and-genetics/v/punnett-square-fun• Read directions for Example 3: Dihybrid

Crosses on page 3• Use FOIL – first, outside, inside, last to

determine the gamete distribution• Do problems 10-20

Monohybrid Crosses

• Legend:• Parent Cross _____ x ______

Genotypic % Phenotypic %

Sex-Linked Crosses

• Legend:• Parent Cross _____ x ______

Genotypic % Phenotypic %

Dihybrid Crosses

• Legend:• Parent Cross _____ x ______

Genotypic Ratios

Phenotypic Ratios