In cattle, coat color is determined by a gene which has four alleles. In order o
ID: 318794 • Letter: I
Question
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 a Solid-colored bull whose mother was Holstein is crossed with a Dutch belt cow whose father was a purebred Hereford, what will be the expected phenotypic ratio of the offspring?
Explanation / Answer
Solid-colored bull(scs) X Dutch belt cow (Ssh)
The offspring produced are with Dutch belt allele and Hereford-type spotting in 1:1 ratio.
male / female sc s S Ssc (Dutch belt) Ss (Dutch belt) sh shsc (Hereford-type) shs (Hereford-type)Related Questions
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