In dogs, dark coat color is dominant over albino, andshort hair is dominant over long hair. Assume that theseeffects are caused by two independently assorting genes.Seven crosses were done as shown below, in which D andA stand for the dark and albino phenotypes, respectively,and S and L stand for the short-hair and long-hairphenotypes.Number of progenyParental phenotypes D, S D, L A, S A, La. D, S × D, S 88 31 29 12b. D, S × D, L 19 18 0 0c. D, S × A, S 21 0 20 0d. A, S × A, S 0 0 29 9e. D, L × D, L 0 31 0 11f. D, S × D, S 45 16 0 0g. D, S × D, L 31 30 10 10Write the genotypes of the parents in each cross. Use thesymbols C and c for the dark and albino coat-color allelesand the symbols H and h for the short-hair and long-hairalleles, respectively. Assume parents are homozygousunless there is evidence otherwise.
In dogs, dark coat color is dominant over albino, and
short hair is dominant over long hair. Assume that these
effects are caused by two independently assorting genes.
Seven crosses were done as shown below, in which D and
A stand for the dark and albino
and S and L stand for the short-hair and long-hair
phenotypes.
Number of progeny
Parental phenotypes D, S D, L A, S A, L
a. D, S × D, S 88 31 29 12
b. D, S × D, L 19 18 0 0
c. D, S × A, S 21 0 20 0
d. A, S × A, S 0 0 29 9
e. D, L × D, L 0 31 0 11
f. D, S × D, S 45 16 0 0
g. D, S × D, L 31 30 10 10
Write the genotypes of the parents in each cross. Use the
symbols C and c for the dark and albino coat-color alleles
and the symbols H and h for the short-hair and long-hair
alleles, respectively. Assume parents are homozygous
unless there is evidence otherwise.
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