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passing on characteristics from parent


study of heredity


Inherited characteristics


All genes in an organism


Different forms of the same gene, get 2 alleles for each trait (mom & dad) tall/short


Two alleles of the same form (2 dominants and 2 recessives)


Different alleles (one dominant and one recessive)


form of gene only expressed in homozygous state, masked by dominant gene


Form of a gene that always shows even if recessive allele is present


Organism's physical appearance caused by expression of genes


Type of gene alleles present in organism's genome (Two letters for each trait

Test cross

Genotypically homozygous recessive organism crossed with a phenotypically dominant organism, used to determine the genotype of an unknown

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