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Punnett Square Worksheet


Cross two heterozygous brown-eyed people (blue eyes are recessive).

Dimples is a dominant trait. A mother that is heterozygous for the gene for dimples with her husband who has no dimples.

Handedness in humans is hereditary with right-handedness dominant to left handedness. Cross a homozygous right-handed person and a left-handed person.

Feathering on the legs of chickens is due to an allele, F. Absence of feathers is due to f. A heterozygous hen with feathers on her legs is mated with a rooster that has bare legs.

In cabbage butterflies, white color (W) is dominant and yellow color (w) is recessive. Cross a pure white cabbage butterfly mates with a yellow cabbage butterfly.

In guinea pigs, black coat color is dominant over white coat color. Cross two heterozygous black guinea pigs.

In rabbits the allele for black coat color (B) is dominant over the allele for brown coat color (b).  Cross an animal homozygous for black coat color (BB) and one homozygous for brown coat color (bb)?