2-1 Inheritance

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What is a homozygous genotype?

Back

A homozygous genotype has two identical alleles for a trait, such as TT or tt.

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What does heterozygous mean?

Back

Heterozygous means having two different alleles for a trait, such as Tt.

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What is a gene?

Back

A gene is a segment of DNA on a chromosome that codes for a specific trait.

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What is genotype?

Back

Genotype refers to an organism's genetic makeup or allele combinations.

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What is phenotype?

Back

Phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

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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 are alleles?

Back

Alleles are different forms of a gene that can exist at a specific locus on a chromosome.

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What is the difference between dominant and recessive alleles?

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Dominant alleles express their trait even if only one copy is present, while recessive alleles require two copies to express their trait.

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What is a Punnett square?

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A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible allele combinations.

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What does it mean if an organism is homozygous dominant?

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An organism is homozygous dominant if it has two dominant alleles for a trait, such as TT.