Passing of traits from parents to offspring.

The study of heredity.

Alternate form of a gene.

Set of two genes or alleles an individual has for a trait.

Observable characteristics based on genotype.

Genotype of two dominant alleles. Example RR

Genotype of two recessive alleles. Example: rr

Genotype of one dominant and one recessive allele. Example: Rr

Section of DNA on a chromosome that contains information for a trait.

Allele that blocks the expression of an alternate allele.

Genetic trait. Example: eye color

Environmental, not genetic, trait. Example: a scar

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