Genetics and Punnett Squares

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What does homozygous mean?

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Homozygous means having two identical alleles for a particular gene.

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What does heterozygous mean?

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Heterozygous means having two different alleles for a particular gene.

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What is a phenotype?

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A phenotype is the physical trait or characteristic of an organism.

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What is a genotype?

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A genotype is the genetic makeup or code of an organism.

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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.

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What is a dominant trait?

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A dominant trait is a trait that is expressed when at least one dominant allele is present.

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What is a recessive trait?

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A recessive trait is a trait that is only expressed when two recessive alleles are present.

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How are recessive traits represented in genetics?

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Recessive traits are represented by lowercase letters.

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How are dominant traits represented in genetics?

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Dominant traits are represented by uppercase letters.

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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.