Genetics Study Guide

A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

An organism is heterozygous when it has two different alleles for a specific gene, one dominant and one recessive.

An organism is homozygous recessive when it has two identical recessive alleles for a specific gene.

50% chance.

Artificial selection is the process by which humans breed animals or plants for specific traits.

Humans select which animals or plants to breed based on desired traits.

A trait is inherited when it is passed down from parents to offspring through genes.

Alleles are different forms of a gene that determine specific traits.

A dominant allele masks the effect of a recessive allele in a heterozygous condition.

The possible genotypes are RR (homozygous dominant) or Rr (heterozygous).