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Dihybrid Cross Practice
6. In horses, coat color black (B) is dominant over chestnut (b). The trotting gait is
dominant (T) over
the pacing gait (t). If a homozygous black pacer is mated to a
homozygous chestnut,
heterozygous trotter, what will be the genotypes and
phenotypes of the offspring? Show your work in the form of a Punnett square and
write your
answers as a phenotypic ratio.

Verified Answer :

GinnyAnswer

Final answer:

The Punnett square predicts offspring genotypes and phenotypes for a dihybrid cross. The resulting phenotypic ratio would be 1:1:1:1 for black trotters, black pacers, chestnut trotters, and chestnut pacers.


Explanation:

Punnett Square:

When mating a homozygous black pacer (BBtt) with a homozygous chestnut, heterozygous trotter (bbTt), the offspring's genotypes will be BbTt (black trotters), Bbtt (black pacers), bbTt (chestnut trotters), and bbtt (chestnut pacers) in a 1:1:1:1 ratio. Phenotypic ratio: 1 black trotter : 1 black pacer : 1 chestnut trotter : 1 chestnut pacer.


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