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What is a dominant trait?

Back

A dominant trait is a genetic trait that is expressed in the phenotype even when only one copy of the allele is present.

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What is a recessive trait?

Back

A recessive trait is a genetic trait that is only expressed in the phenotype when two copies of the allele are present.

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How are dominant traits represented in genetic notation?

Back

Dominant traits are represented by uppercase letters.

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How are recessive traits represented in genetic notation?

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Recessive traits are represented by lowercase letters.

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What does the term 'homozygous' mean?

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Homozygous refers to having two identical alleles for a particular gene.

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What does the term 'heterozygous' mean?

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Heterozygous refers to having two different alleles for a particular gene.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

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What is a genotype?

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A genotype is the genetic constitution of an individual, specifically the alleles present for a particular gene.

Front

What is a Punnett square used for?

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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.

Front

What does a 1:2:1 ratio in a Punnett square indicate?

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A 1:2:1 ratio indicates that there is one homozygous dominant, two heterozygous, and one homozygous recessive offspring expected from a cross.