Punnett Squares/Heredity

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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 combinations of alleles from the parents.

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What does it mean if a trait is dominant?

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A dominant trait is one that will appear in the offspring if at least one parent contributes the dominant allele.

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What does it mean if a trait is recessive?

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A recessive trait will only appear in the offspring if both parents contribute the recessive allele.

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What is the genotype of a heterozygous organism?

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The genotype of a heterozygous organism consists of two different alleles, such as Bb.

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What is the genotype of a homozygous organism?

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The genotype of a homozygous organism consists of two identical alleles, such as BB or bb.

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What is incomplete dominance?

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Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a blend of traits, such as gray fur from black and white parents.

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What is codominance?

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Codominance is a genetic situation where both alleles in a heterozygous organism are fully expressed, resulting in offspring with a phenotype that shows both traits.

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Who is Gregor Mendel?

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Gregor Mendel is known as the father of genetics for his work on inheritance patterns in pea plants.

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What are alleles?

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

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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 both genetic makeup and environmental influences.