Heredity

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What is heredity?

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Heredity is the passing of traits from parents to offspring through genes.

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What is a genotype?

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A genotype is the genetic makeup of an organism, represented by letters (e.g., TT, Tt, tt).

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What is a phenotype?

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A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype (e.g., blue eyes, tall plant).

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What does homozygous mean?

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Homozygous refers to having two identical alleles for a particular gene (e.g., AA or aa).

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What does heterozygous mean?

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Heterozygous refers to having two different alleles for a particular gene (e.g., Aa).

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What is a dominant allele?

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A dominant allele is an allele that expresses its trait even when only one copy is present (e.g., A in Aa).

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What is a recessive allele?

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A recessive allele is an allele that only expresses its trait when two copies are present (e.g., aa).

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How many letters does a genotype contain?

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A genotype contains 2 letters.

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What is the genotype for Tt?

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The genotype for Tt is heterozygous.

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What is homozygous recessive?

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Homozygous recessive refers to having two identical recessive alleles for a gene (e.g., rr).