# What is the genotypic percentage of the offspring?

Contents

## What percentage of the offspring have the genotype AA?

There is a 50% chance for each of the four offspring to have the genotype Aa.

## What is a genotype in a Punnett square?

▪ Genotype: The letters that make up the individual. E.g. TT or Tt. ▪ Phenotype: The physical characteristics of the particular trait. E.g. Tall or short. ▪ Dominant trait: Signified by capital letter-E.g. T.

## How do you determine the number of genotypes and phenotypes?

c. The number of different genotypes is 3 n where n = number of genes. For simple dominant–recessive relations, the number of different phenotypes is 2 n , where n = number of genes.

## What percentage of offspring would have genotype?

In the cross shown above, you can see that one out of four offspring (25 percent) has the genotype PP, one out of four (25 percent) has the genotype pp, and two out of four (50 percent) have the genotype Pp. These percentages of genotypes are what you would expect in any cross between two heterozygous parents.

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