Predicting Traits with Punnett Squares

Punnett squares help students predict how traits may be passed from parents to offspring. They are a simple grid used in genetics to organize possible allele combinations. An allele is a version of a gene.

The square compares the alleles each parent can give. By filling in the boxes, students can...

The Punnet square, a simple diagram named after its inventor, is a graphical way to predict the likelihood that offspring may inherit a single gene trait, like lactose intolerance, given the parental genotypes.

Using this grid, the genetic contributions of one parent, who in this case, is homozygous recessive with alleles denoted as two ...