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Practice problem

Dihybrid Crosses — Definition & Examples

By Valeri Natole

Scientists have shown that freckles and widow’s peak hairlines each come from a single gene. A person with a widow’s peak and freckles must have a dominant genotype for both traits. Hairline and freckles/no freckles are inherited independently.

Widow's peak hairline and freckles

Image Source: by Valeri Natole

How many different combinations of the hairline and freckle genes will result in a child with a widow's peak hairline and freckles?

Choose one answer

Type a concept, like “slope” or “photosynthesis”.

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