Inheritance & Genetic Variation Review

A dominant allele is a version of a gene that will express its trait even if only one copy is present in an individual.

A recessive allele is a version of a gene that only expresses its trait if two copies are present in an individual.

Chromosomes are long, tightly-wound strands of DNA that contain genes.

Genes are segments of DNA that determine specific traits in an organism.

Alleles are different versions of a gene that can exist for a particular trait.

A Punnett Square is a diagram used in genetics to predict the genotype and phenotype ratios of potential offspring.

Humans inherit traits from their parents through the genes they pass down.

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

A genotype is the genetic makeup of an organism, consisting of the alleles it possesses.

Genetic variation refers to the differences in DNA sequences among individuals, which can lead to different traits.