Frizzled feathers (F) are dominant to straight feathers (f).

Two straight feathers are crossed.

What is the percent of the offspring can be expected to have frizzled feathers?

A Blue troll (B) is dominant to a pink troll (b). A hybrid troll is crossed with a pure pink troll.

What is the Phenotypic probability of offspring when a pink troll mates with a heterozygous blue troll.

Brown eyes are dominant to green eyes. What would be the genotypic ratio of the offspring when both parents are hybrid?

All budgies are born with either a yellow or white base. The base refers to the type of pigmentation on a budgie's feathers. Yellow base birds have a yellow pigment, while a white base bird lacks pigment. A white base bird has a white head and a blue body, which is recessive to a yellow base bird with a yellow head and green body.

What are the genotypes of the parents when the outcome is 50% yellow base birds and 50% white base birds?

Cystic fibrosis is an X linked disease where X^N are healthy and Xⁿ have Cystic fibrosis.

A woman who is a carrier (heterozygous) for Cystic Fibrosis mates with a man who has Cystic Fibrosis, a recessive disease.

What percentage of their offspring will be carriers for the disease?

A species of river fish have scales that appear blue or brown in color.

A solid blue fish has a genotype of C^AC^A while a solid brown fish has a genotype of C^CC^C. Heterozygous fish appear to have both blue and brown scales.

When a blue fish mates with a heterozygous fish, what is the expected ratio of the resulting offspring?

A model of the color patterns in zebrafish is shown below.

Which Punnett square represents a cross that would produce Nacre offspring?

In humans, hemophilia is a sex linked trait. Females can be normal (X^HX^H), carriers (X^HX^h), or have the disease (X^hX^h). Males either have the disease (X^hY) or they do not (X^HY).

Of the choices below, which cross produces female carriers of hemophilia?