Lab: Heredity and Punnett Squares Answers

Yellow seed color is dominant over green. What is the phenotype of an offspring that is Yy?

A scientist is studying a cross between plants that are heterozygous (Xx) for a certain trait. She will use a table similar to this one to make a Punnett square for the cross.

The shapes are placed in a basket.

Tall plants are dominant over short plants. One parent is homozygous dominant and the other is heterozygous for plant height. Which would most likely be the resulting phenotype of the offspring?

A parent that is heterozygous for a trait is crossed with a parent that is homozygous dominant for the trait, as shown in the Punnett square.

phenotypeprobabilityDNAcross

The Punnett square shows the possible genotype combinations for the offspring of two parents.

The diagram shows two types of seeds.

A parent that is heterozygous for a trait is crossed with a parent that is homozygous recessive for the same trait, as shown in the Punnett square.

The Punnett square shows the possible genotype combinations of two parents who are heterozygous for a particular trait.