In cattle coat color is determined by a gene which has four

In cattle, coat color is determined by a gene which has four alleles. In order of dominance, the alleles are: -Dutch belt allele (S)—a band of white color around the middle of the animal -Hereford-type spotting (sh)—white on legs, head, and belly -Solid color allele (sc) allele—solid color -Holstein-type spotting (s)—large irregular black spots over the entire body If homozygous Hereford bulls are crossed with Holstein-type spotted cows, what will be the expected phenotypic ratio of the offspring? Question 15 options: A) All Holstein B) All Hereford C) 3/4 Hereford :1/4 Holstein D) 3/4 Holstein : 1/4 Hereford E) 1/2 Hereford : 1/2 Holstein Save

Solution

Hereford bulls (sh) are dominant over Holstein type cows (s). So if crossed, the result gives normal monohybrid cross phenotype ratio

I.e 3:1

3 = sh type and 1 = s type

So the Answer is C.