The coat color in mink is controlled by two codominant a...

Question

The coat color in mink is controlled by two codominant alleles at a single locus. Red coat color is produced by the genotype R₁R₁, silver coat by the genotype R₁R₂, and platinum color by R₂R₂. White spotting of the coat is a recessive trait found with the genotype ss. Solid coat color is found with the S– genotype.

Two crosses are made between mink. Cross 1 is the cross of a solid, silver mink to one that is solid, platinum. Cross 2 is between a spotted, silver mink and one that is solid, silver. The progeny are described in the table below. Use these data to determine the genotypes of the parents in each cross.

Table showing offspring results from two genetic crosses in mink coat color study.

Accepted Answer

Hello, everyone. Here we have a question that says in cattles, the polled absence of horn condition is dominant over horned and the coat color is controlled by two co dominant alleles. The genotype capital R capital art produces red coat color. Capital R, capital, W produces Rome and capital W capital W produces white. A dairy farmer crossed pulled rhone bulls with pulled white cows on his farm. And the falling offspring were produced horned, white, four horn drone, six horned red zero, pulled white, 12 pole drone, 10 pulled red zero. And our goal here is to determine the genotype of the bulls and the cows used by the dairy farmer for crossing. Our options are a bulls capital, P capital, P capital, R capital W cows, capital, P capital, P capital, W capital W B bulls, capital, P lowercase P capital, R capital, W cows capital, P lowercase P capital, W capital, W see bulls capital, P lowercase P capital, R, capital W cows, capital, P capital, P capital, W capital, W de bulls capital, P capital, P capital, R capital W cows capital, P lowercase P capital, W capital W. So since the offspring have horns the parents must be hetero ziva's. So let's draw that Punnett Square, we have the male capital P lowercase P in the female capital P capital P which gives us capital P capital, P capital, P, lowercase P capital, P, lower case P, lower case P, lower case P. So we have 1/4 capital P capital, P, 1/2 capital p lowercase p and 1/4 lower case P, lower case P. Now for coat color, we have the male capital, R, capital, W and the female capital W capital W. So we have capital R, capital, W capital, W capital, W capital, R capital, W capital W capital, W. So we have one half capital, R, capital, W and one half capital W capital W and now we want to cross these. So we'll have 1 4th capital P capital, P, one half capital R capital, W, one half capital W capital W. So we will have 1/ capital P capital, P capital, R capital, W which is pulled rum. And then we have 1/2 capital P lowercase P which gives us one half, capital, R, capital, W and one half capital W capital W which gives us one, a 1 4th capital, P lowercase P capital, W capital, W which is pulled wide. And lastly, we have 1 4th lower case P, lower case P And with that, we're going to have 1/2 capital R capital, W and one half capital W capital, W So that will give us 1/8. Lower case P, lower case P capital W capital W which is horned white. So now let's cross these. So we will have 11/ equals 38, 12/ equals 38, 6/32 equals 1/8. And lastly, 4/32 equals 18. So our answer here is B Bulls capital, P lowercase P capital, R capital, W cows, capital, P lowercase P capital, W capital W thank you for watching. Bye.

Watch next