R = can roll tongue r = cannot roll tongue

Cross Rr with Rr. What is the expected PHENOTYPIC ratio?

Select ALL of the phenotypes

Select ALL of the genotypes

In humans the allele for albinism is recessive to the allele for normal skin

pigmentation. If two heterozygous parents have children, what is the chance that a

child will have normal skin pigment? What is the chance that a child will have

albinism?

Homozygous red radishes (RR) crossed with homozygous white radishes (WW) make pink radishes (RW). This is called incomplete dominance. What are the phenotypic ratios when you cross pink radish with a white radish?

In certain fish, red (RR) and blue fish (BB) when mated create offspring with a patchwork ofblue AND red scales (BR). Genotypic probabilities for a

cross between a blue fish and a fish with patchwork red/blue scales?

One parent has type A blood and the other parent has type B blood. They have a child with Type O blood. What are the parents' genotypes?.

Colorblindness is a recessive trait carried on the X chromosome (is sex-linked).

A colorblind male has children with a female who is not colorblind but carries the gene for colorblindness. They are expecting a child. What is the probability that the child is a colorblind daughter?

The genetic disorder phenylketonuria, or PKU, is autosomal recessive. Fortunately, if treatment begins early, a person can live their lives with little impact from the disease. If one parent has PKU and the other parent is homozygous normal, what is the probability their children could get PKU?