3. (22 pts) Tennessee Walking Horses and Clydesdales are breeds of horses that have the sabino white color pattern. The gene for sabino in Tennessee Walkers is on a different locus from that for Clydesdales. Both are dominant genes, and each breed is homozygous recessive for the other breed's sabino gene. The Tennessee Walker is heterozygous for their breed's sabino gene (homozygous dominant individuals are completely white), while Clydesdales are homozygous for their breed's sabino gene. A. (2 pts) If SB1 represents the dominant allele for sabino in Tennessee Walkers and B the dominant allele for sabino in Clydesdales, what is the genotype of each breed if they are sabino? B. (10 pts) Assume the cross between dihybrids sabino individuals from these breeds (heterozygous for all loci). What are the genotypic and phenotypic ratios in the foals? C. ( 2 pts) How many unique gametes can the sire from 3 B produce? D. (2 pts) How many unique zygotes can be produced from the mating described in 3B E. (2 pts) What is the probability of a sabino foal in the progeny of this mating? F. (2 pts) Assuming that during the foaling season were born 1000 colts, how many are sabino?
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3- (22 pts) Tennessee Walking Horses and Clydesdales are breeds of hor.docx
1. 3. (22 pts) Tennessee Walking Horses and Clydesdales are breeds of horses that have the sabino
white color pattern. The gene for sabino in Tennessee Walkers is on a different locus from that
for Clydesdales. Both are dominant genes, and each breed is homozygous recessive for the other
breed's sabino gene. The Tennessee Walker is heterozygous for their breed's sabino gene
(homozygous dominant individuals are completely white), while Clydesdales are homozygous
for their breed's sabino gene. A. (2 pts) If SB1 represents the dominant allele for sabino in
Tennessee Walkers and B the dominant allele for sabino in Clydesdales, what is the genotype of
each breed if they are sabino? B. (10 pts) Assume the cross between dihybrids sabino individuals
from these breeds (heterozygous for all loci). What are the genotypic and phenotypic ratios in the
foals? C. ( 2 pts) How many unique gametes can the sire from 3 B produce? D. (2 pts) How
many unique zygotes can be produced from the mating described in 3B E. (2 pts) What is the
probability of a sabino foal in the progeny of this mating? F. (2 pts) Assuming that during the
foaling season were born 1000 colts, how many are sabino?
