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Calibri
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DNA from the
Slide
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.

Question

11-05-2024
Biology

Answered

ls Extensions Help Accessibility
2
Calibri
4
3
DNA from the
Slide
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.

Answer :

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GinnyAnswer GinnyAnswer · Answer 1 · 2024-05-11T00:27:53-04:00

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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