Pea plant #1, smooth and yellow, is mated to other peas, all winkled and green. The usual loci and alleles. No interactions and 100% penetrance. The progeny of that mating:
39 smooth & yellow, 36 wrinkled & green, 7 smooth & green, 10 wrinkled & yellow.
1) what are the parental classes of progeny?
2) what is the recombination frequency for these data?
3) what was the linkage phase (cis or trans, coupling or repulsion) of the dominant alleles in pea #1?
Pea plant #1, smooth and yellow, is mated to other peas, all winkled and green. The usual loci and alleles. No interactions and 100% penetrance. The progeny of that mating:
39 smooth & yellow, 36 wrinkled & green, 7 smooth & green, 10 wrinkled & yellow.
1) what are the parental classes of progeny?
2) what is the recombination frequency for these data?
3) what was the linkage phase (cis or trans, coupling or repulsion) of the dominant alleles in pea #1?
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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