Genetics

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What is genetics?

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Genetics is the study of heredity and the variation of inherited characteristics.

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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 homozygous mean?

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Homozygous refers to having two identical alleles for a particular gene (e.g., SS or ss).

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What does heterozygous mean?

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Heterozygous refers to having two different alleles for a particular gene (e.g., Ss).

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What is the difference between genotype and phenotype?

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Genotype is the genetic makeup of an organism, while phenotype is the observable physical traits.

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What is complete dominance?

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Complete dominance occurs when one allele completely masks the effect of another allele in a heterozygous genotype.

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What is codominance?

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Codominance is a genetic scenario where both alleles in a heterozygous genotype are fully expressed, resulting in a phenotype that shows both traits.

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What is incomplete dominance?

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Incomplete dominance is when the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

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How many alleles does an offspring receive from each parent?

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An offspring receives one allele from each parent for a specific trait.

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What is a phenotype ratio?

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A phenotype ratio is the ratio of different phenotypes that appear in the offspring from a genetic cross.