Heredity - The study of how traits are passed from parents to offspring., Gene - A gene is a segment of DNA that codes for a specific trait., Allele - An allele is an alternative form of a gene, Dominant - Observed trait that masks the recessive form of a trait. Represented by CAPITAL LETTERS., Recessive - Trait that can be masked by the dominant form of a gene. Represented by a lowercase letter., Complete Dominance - Observed trait that masks the recessive form of a trait., Incomplete Dominance - When a combination of alleles produces an intermediate trait. Ex: Red flower (RR) x white flower (rr) = pink flower (Rr), Co-Dominance - Both alleles are always expressed. Example: Blood types or cow fur color (brown and white spots), Homozygous - Same alleles joined together (ex: BB or bb), Heterozygous - Different alleles joined together (ex: Hh), Homozygous Dominant - Both alleles are dominant genes. Ex: AA or GG, Homozygous Recessive - Both alleles are recessive genes. Ex: aa or gg, Phenotype - The physical appearance. The outward expression of a gene. What the organism looks like., Genotype - Combination of alleles in an organism. Ex: BB, Bb, bb,

Genetic Combinations Vocab

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