Amoeba Sisters Mega Genetics Review

What is the genotype ratio when crossing a hairless guinea pig (hh) with a heterozygous guinea pig (Hh)?

• 4:0

• 3:1

• 1:1

• 2:2

In a dihybrid cross between two heterozygous cats (HhSs), what is the expected phenotype ratio?

• 1:1

• 9:3:3:1

• 3:1

• 4:4

What is the phenotype ratio of offspring when two pink snapdragons (Rr) are crossed?

• 1 red: 2 pink: 1 white

• 2 red: 2 pink

• 3 pink: 1 white

• 1 red: 3 white

If a heterozygous type A parent and a heterozygous type B parent have a child, what is the probability the child will have type O blood?

• 75%

• 50%

• 0%

• 25%

In a pedigree, what does a shaded circle typically represent?

• A female with the trait of interest

• A male with the trait of interest

• A female without the trait of interest

• A male without the trait of interest