In a classic experiment, a cross between two dark-pigmented mice produced both dark- and light-pigmented offspring. Dark pigmented was thought to be due to the autosomal dominant allele D, while light pigmented was due to the autosomal recessive allele d. The dark-pigmented parental mice were known to be heterozygous. For this cross, the ratio of offspring phenotypes was 2 dark pigmented: 1 light pigmented. Which genotype resulting from this cross would not survive?Multiple choice question.DdDDdd

In mice yellow (Y) is dominant to grey (y) coat color. However, the homozygous dominant genotype (YY) is lethal.If you cross two yellow mice, what proportion of the F1 offspring will be yellow?Group of answer choices3/42/31/3

In mice, the allele for black fur is dominant to the allele for brown fur. If a male heterozygous black mouse is crossed with a female brown mouse, what percentage of the F1 offspring do you predict will be homozygous? (Enter the number only without the percent sign, e.g., enter 100% as 100 and enter 12.5% as 12.5)

Fur color in mice is affected by a gene with two alleles. The B allele causes dark brown fur and is completely dominant over the b allele that causes light brown fur. What is the fur color of a mouse with the genotype Bb?Multiple choice question.Light brown furVery dark brown fur due to two different alleles being presentDark brown furA mixture of dark brown and light brown fur

In mice, the recessive form of a gene causes the death of the fetus if present in the homozygous state. Mice heterozygous for this gene were crossbred. What percentage of the live offspring would be homozygous dominant? A) A 0 % B) B 25 % C) C 33 % D) D 50 % E) E 66 %

In a population of 200 mice, 168 mice are black, and 32 mice are white. 96 of the black mice are heterozygous for the color trait. What is the frequency of the black allele in the population? (Assume simple dominance/recessiveness of a single gene with two alleles for the fur color trait.)Multiple Choice0.360.60.70.84