Frayer Model Vocabulary Review. Genotype Definition: Set of alleles that an individual has for a...
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Transcript of Frayer Model Vocabulary Review. Genotype Definition: Set of alleles that an individual has for a...
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