I know how to do this problem without taking into considerat

I know how to do this problem without taking into consideration the interference. But how does interference change the answer to this problem? Any help is appreciated

In pumpkin:

L_=large, hh=small

O_=bright orange, oo=off white

R_=resistant to caterpillars, rr=susceptible

Map: O--5mu--L----10mu----R

Interference=0.6  

Cross: OlR//oLr x olr//olr. // = haplotypes

How many plants producing bright orange, large and resistant pumpkins do you expect out of 1000 progeny?

Solution

Answer: One(1)

Only one plant will be produced bright orange, large and resistant pumpkins out of 1000 progeny.

Explanation:

Interference = 1- Coefficent of Coincidence (COC)

0.6 = 1-COC

COC = 0.4

COC = Observered double crossovers / Expected double crossover

Expected double crossover = 5 * 10 = 50/1000 = 0.05

Observered double crossovers = COC * Expected double crossover

= 0.4 * 0.05 = 0.02

Observed double crossovers = 0.02 out of 1000population= 2

Double crossover gametes of genotype (OlR//oLr) = OLR (1) & olr (1).

If the gametes are mated with gamete olr of gentoype (olr//olr), OoLlRr (Bright orange, large and resistant pumpkins) & oohhrr (Off white, small and susceptible) genotypes will be produced.

Double crossover genotypes are OoLlRr (Bright orange, large and resistant pumpkins) & oollrr (Off white, small and susceptible). Only one of each double crossover combination of plant is produced.