Punnett Squares

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What is a Punnett Square?

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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 homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as 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, such as Aa.

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What is a genotype?

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A genotype is the genetic constitution of an individual, represented by the alleles they possess.

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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.

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What is the difference between dominant and recessive alleles?

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Dominant alleles express their traits even when only one copy is present, while recessive alleles only express their traits when two copies are present.

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What is the purpose of using a Punnett Square?

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The purpose of using a Punnett Square is to determine the possible genotypes and phenotypes of offspring from a genetic cross.

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What is a homozygous dominant genotype?

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A homozygous dominant genotype has two dominant alleles, such as AA or BB.

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What is a homozygous recessive genotype?

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A homozygous recessive genotype has two recessive alleles, such as aa or bb.

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What is a heterozygous genotype?

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A heterozygous genotype has one dominant and one recessive allele, such as Aa or Bb.