a) Another cross in Drosophila involved the recessive, X-linked genes yellow(y),

Question

a) Another cross in Drosophila involved the recessive, X-linked genes yellow(y), white(w), and cut(ct). A yellow-bodied, white-eyed female with normal wings was crossed to a male whose eyes and body were normal but whose wings were cut. The F1 females were wild type for all three traits, while the F1 males expressed the yellow-body and white-eye traits. The cross was carried to F2, and only male offspring were tallied. On the basis of the data shown here, a genetic map was constructed. (problem #15 from textbook Chap5) What is the genotype of F1 mother?

Answer: y w +/+ + ct

b) Based on the data from the previous problem (Chap. 5, #15 in textbook), which gene should be in the middle in genetic map?
a. ct     b. y      c. unknown     d. w

c) what is the genetic distance between genes y and ct?
i)1.6     ii)32     iii) 21.6    iv)20    v) cann't determine.    

d) what is the interference?
i)0   ii) 0.2   iii) 0.5    iv)1      v) cann't be determined

Explanation / Answer

b) d. w

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.