Question

dce 4) Assume a three-point cross in which uu bbt mm* was crossed to uu* bb mm and the offspring had the following genosypes 782 128 uu-bbt-mm er of the genes? A. ubm C. bmu 5) What is the closest to correct map 15 7.5 Cm D. 15.b X 6) Using the map distances of 7 5 and 15, what is the closest value to the interference? A. 40 B. 45 С.50 D. 55 E. .60
number 5 please show work and explain!

Answer 1

Answer: option A is correct answer

Correct sequence of gene: ubm

Now we want to calculate the distance between them

Between b and m

Step1: Find out single cross over between b and m

uu+ bb mm+ :68 and uu bb+ mm: 82

Now,

Distance between two gene= [(number of single cross over+number of double cross over)/total number of progeny]×100

For b and m= [(68+82+7+3)/2000]×100

= 8 cM

Distance between u and b

Single cross over between the u and b

uu+ bb+ mm+: 172 and uu bb mm: 128

For u and b= [(172+128+7+3)/2000]×100

=15.5 cM