Punnett Squares & Pedigree Charts

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What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genetic makeup of offspring from two parents based on their genotypes.

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What does genotype refer to?

Back

Genotype refers to the genetic makeup of an individual, including the alleles they possess.

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What is the difference between homozygous and heterozygous?

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Homozygous means having two identical alleles for a specific trait, while heterozygous means having two different alleles.

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What is phenotype?

Back

Phenotype refers to the physical appearance or observable traits of an individual.

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What is codominance?

Back

Codominance is a genetic scenario where both alleles in a heterozygous individual contribute equally to the phenotype.

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What is incomplete dominance?

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Incomplete dominance is a genetic situation where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

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What does a pedigree chart represent?

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A pedigree chart is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors.

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What is the purpose of a Punnett Square?

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The purpose of a Punnett Square is to determine the probability of an offspring inheriting a particular genotype.

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What does it mean if an individual is homozygous recessive?

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An individual is homozygous recessive if they have two copies of the recessive allele for a specific trait.

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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 in the genotype.