In guinea pigs, the color of the fur is determined by a single gene with two alleles control. The brown allele (B) is dominant o

Question

3 years ago

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In guinea pigs, the color of the fur is determined by a single gene with two alleles control. The brown allele (B) is dominant o

ver the white allele (b). Two heterozygous guinea pigs are crossed. Draw a genetic diagram with the genotypic, phenotypic and ratio information of the P₁ and F ₁ generations of this cross.

Biology

1 answer:

Kipish [7] · Answer 1 · 2022-05-30T16:08:50+03:00

Answer:

See

Explanation:

Given:

Brown allele (B) is dominant over the white allele (b).

It will be assumed that the alleles are not related to the X and Y chromosomes.

See attached diagram for details of the general case (for both homo-zygous and hetero-zygous parents)

For both parents hetero-zygous,

P1:

Genotype: Bb (100%)

Phenotype: brown (100%)

F1:

Genotypes : BB, Bb, bB and bb in equal proportions, i.e.

BB (25%), Bb (50%), bb (25%)

Phenotypes: 75% brown (from BB and Bb), 25% white (from bb)