Punnett Squares

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What is a Punnett Square?

Back

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 'codominance' mean?

Back

Codominance is a genetic scenario where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

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What is 'incomplete dominance'?

Back

Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a third phenotype that is a blend of the two.

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What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., BB, Bb, bb).

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What is a phenotype?

Back

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

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What does 'allele' mean?

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An allele is a variant form of a gene that can produce different traits.

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What is the purpose of a Punnett Square?

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The purpose of a Punnett Square is to predict the probability of an offspring inheriting particular traits from its parents.

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How do you determine the possible genotypes of offspring using a Punnett Square?

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By filling in the squares with the combinations of alleles from each parent, you can determine the possible genotypes of the offspring.

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What is the significance of the letters used in a Punnett Square?

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The letters represent different alleles; uppercase letters denote dominant alleles, while lowercase letters denote recessive alleles.

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What is the expected phenotype ratio for a monohybrid cross?

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The expected phenotype ratio for a monohybrid cross is typically 3:1 for dominant to recessive traits.