2) In a series of two point map crosses involving 5 genes located on chromosome

Question

2) In a series of two point map crosses involving 5 genes located on chromosome 9 in com, the following recombinant (single-crossover) frequencie s were observed d - sh sh -s sh- bz bz-c 29 19 c- S bz - d Distance of (d) to centromere placement - 60 map units 31 a) If the d-gene is present at the end of chromosome 9 (locus 0), construct a map of these genes In another set of experiments, a sixth gene (w) was tested against sh and s, and the results were: 49% b) w-sh Predict the results of two-point maps between w and bz, w and c, and w and d. 27% W-s

Explanation / Answer

Answer:

a).

The chromosome map is as follows:

d--7---s------19------c---3---sh----2----bz

b).

The sixth gene (w) was placed at the end of chromosomes so that we got w-s = 27% & w-s = 49%.

d--7---s------19-----c---3---sh----2----bz--------25-----------w

Then two-point maps are as follows.

w-bz = 25%

w-c = 30%

w-d = 56%

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

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