In one short chromosome arm the average frequency of crossovers per meiosis was measured to be 0.5.What proportion of meioses will have no crossovers at all in this region?
A)0.40
B)0.52
C)0.60
D)0.74
E)0.90

Question

Quizplus · Accepted Answer

The average frequency of crossovers per meiosis follows a Poisson distribution. The probability of no crossovers (k=0) is given by e^(-λ), where λ is the average frequency. Here, λ = 0.5, so the probability is e^(-0.5) ≈ 0.60.

In One Short Chromosome Arm the Average Frequency of Crossovers