Frayer Model Vocabulary Review

Genotype Definition: Set of alleles that an individual has for a character Characteristics: pair of alleles, written as two letters, determines genotype, etc. Examples: PP, Ee, tt Non-examples: blue eyes, freckles, tall plant

Phenotype Definition: trait that results from an individual’s alleles Characteristics: physical appearance/trait, visible, determined by genotype Examples: blue eyes, freckles, tall plant Non-examples: PP, Ee, tt

Dominant Definition: expressed when allele is present in a genotype/individual Characteristics: “wins” over other alleles, overshadows recessive allele, expressed, capital letter Examples: brown eyes, freckles, dimples Non-examples: blue eyes, no freckles, no dimples

Recessive Definition: only expressed when dominant allele is not present Characteristics: written as lower case letter, usually overshadowed, only expressed in homozygous condition Examples: blue eyes, no freckles, no dimples Non-examples: brown eyes, freckles, dimples

Homozygous Definition: having two identical alleles for a characteristic Characteristics: SAME, two dominant or two recessive Examples: PP, tt Non-examples: Bb

Heterozygous Definition: having two different alleles for a characteristic Characteristics: DIFFERENT, one dominant & one recessive Examples: Bb Non-examples: PP, tt