Monohybrid, dihybrid, mutations

Front

What is a monohybrid cross?

Back

A genetic cross between individuals that differ in one trait, typically involving one pair of contrasting traits.

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What is a dihybrid cross?

Back

A genetic cross between individuals that differ in two traits, typically involving two pairs of contrasting traits.

Front

What does it mean for a trait to be dominant?

Back

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

Front

What does it mean for a trait to be recessive?

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

Front

What is the expected phenotypic ratio of a monohybrid cross?

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The expected phenotypic ratio is 3:1 for dominant to recessive traits.

Front

What is the expected phenotypic ratio of a dihybrid cross?

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The expected phenotypic ratio is 9:3:3:1 for the four possible phenotypes.

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What is a mutation?

Back

A mutation is a change in the DNA sequence that can lead to changes in the organism's traits.

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What are insertions in the context of mutations?

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Insertions are mutations where extra base pairs are added into the DNA sequence.

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What are deletions in the context of mutations?

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Deletions are mutations where base pairs are removed from the DNA sequence.

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What is a frameshift mutation?

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A frameshift mutation occurs when insertions or deletions change the reading frame of the genetic code.