1. (4) A true breeding strain (S1) of guinea pig has dominant alleles for fur texture...
1. (4) A true breeding strain (S1) of guinea pig has dominant alleles for fur texture (R), fur colour (C), and hair length (L). Another strain (S2) is homozygous for the recessive alleles of all three genes. The three genes are linked and arranged on the chromosome as follows:
R--------7 m.u. -------C----------------------18
m.u.-----------------L
The F1 trihybrid between the two strains is backcrossed to strain
S2. Assume that there is no interference.
A) What proportion of the backcrossed progeny will resemble strain
S1 for all three traits?
B) What proportion of the backcrossed progeny will resemble strain
S2 for all three traits?
C) What proportion of the backcrossed progeny will resemble strain
S1 for R and L but strain S2 for C?
D) What proportion of the backcrossed progeny will resemble strain
S1 for R and C but strain S2 for L?
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1. (4) A true breeding strain (S1) of guinea pig has dominant
alleles for fur texture...
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