Mendelian fashion? Background to problems 7 and 8: The yellow () gene in a parti
ID: 273876 • Letter: M
Question
Mendelian fashion? Background to problems 7 and 8: The yellow () gene in a particular diploid animal species is X-linked. W normal individuals have tan bodies, mutations in the yellow gene cause a yellow body color. When a yellow- bodied female was crossed to tan-bodied male, the following phenotypes were observed among 100 progeny tan-bodied females 48 ; yellow-bodied males 52; tan-bodied males 0; yellow-bodied females 0 Based on these results, answer the following: 7) Is the mutant allele () dominant or recessive with respect to wild type Dominant 8) when the F, flies are interbreed (G.e, the yellow-bodied F, males are allowed to mate with the tan dfed F females), what fraction of the resulting F2 progeny should be yellow-bodied females? em 52 TS4 Additional human genetics/pedigree problems 9) Ted and Carol are both phenotypically normal. . However, Ted's mother and Carol's paternal grandmother both had phenylketonuria. (PKU is autosomal recessive.) Based on this information, what is the probability that a child born to Ted and Carol would have PKU?Explanation / Answer
7. The mutant allele(y) is dominant with respect to wild type.(y*).
8. 1/2 of the progeny should be yellow-bodied females.