Question 3 (6 pts). In hogs, colored hair (H) is completely dominant to colorless (h) and bent tails (B) are completely dominant to straight tails (b). There are no interlocus interactions. Penetrance and expressivity are 100%. The two loci are not sex-linked. The phenotypes and frequencies of progeny following testcrosses of hogs 1 and 2 to a double recessive genotype (hh bb) are listed in the table:
Phenotype
Testcross
Progeny of hog 1
Testcross
Progeny of hog 2
colored, bent
134
28
colored, straight
11
335
colorless, bent
12
358
colorless, straight
143
30
TOTALS
300
751
For testcross progeny of hog 1, what are the recombinant classes or recombinant phenotypes in the progeny?
For testcross progeny of hog 2, what are parental classes or parental phenotypes in the progeny?
For hog 2, are the recessive alleles in the cis or trans configuration?
(2 pts) How far apart (in cM) are the two gene loci on the genetic map? You can use data from progeny of hog 1 or hog 2. Show your work.
For hog 1, If the two loci were sorting or segregating independently, what fraction of the testcross progeny would you expect to have colored hair and straight tails
Question 3 (6 pts). In hogs, colored hair (H) is completely dominant to colorless (h) and bent tails (B) are completely dominant to straight tails (b). There are no interlocus interactions. Penetrance and expressivity are 100%. The two loci are not sex-linked. The phenotypes and frequencies of progeny following testcrosses of hogs 1 and 2 to a double recessive genotype (hh bb) are listed in the table:
Phenotype | Testcross Progeny of hog 1 | Testcross Progeny of hog 2 |
colored, bent | 134 | 28 |
colored, straight | 11 | 335 |
colorless, bent | 12 | 358 |
colorless, straight | 143 | 30 |
TOTALS | 300 | 751 |
For testcross progeny of hog 1, what are the recombinant classes or recombinant phenotypes in the progeny?
For testcross progeny of hog 2, what are parental classes or parental phenotypes in the progeny?
For hog 2, are the recessive alleles in the cis or trans configuration?
(2 pts) How far apart (in cM) are the two gene loci on the genetic map? You can use data from progeny of hog 1 or hog 2. Show your work.
For hog 1, If the two loci were sorting or segregating independently, what fraction of the testcross progeny would you expect to have colored hair and straight tails