Genetics Chapter 4

Ratio for dominant suppression?

• 9:3:3:1

• 13:3

• 12:3:1

• 4:1

• A child has AB blood type, who can he receive blood from?

• AB

• B

• A

• O

In recessive epistasis, using the Labrador retriever example, ee codes for...?

• brown lab

• yellow lab

• black lab

• no pigment

ratio for dominant gene interaction?

• 9:3:3:1

• 12:1

• 9:6:1

• 15:1

What is pleiotrophy and give an example

genotype and phenotype always match

• variable expressivity

• complete penetrance

• nonpenetrant

• incomplete penetrance

Which is an example of variable expressivity?

• Marfan Syndrome

• Sickle Cell Disease

• Waardenburg Syndrome

• Achondroplasia

In the example of the Agouti Gene, A^Y is dominant and recessive (T/F)

• True

• False

What are lethal alleles?

Dihybrid cross shows epistasis

• True

• False