Punnett square

Definition

A Punnett square is a diagram used in genetics to predict the outcome of a particular cross or breeding experiment. It illustrates how alleles from parents can combine in offspring, showing possible genotypes.

Related terms

Genotype:

The genetic makeup of an organism in terms of the alleles present.

Phenotype:

The observable characteristics or traits of an organism, resulting from the interaction between its genotype and the environment.

Allele:

One of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome