Question

In: Biology

What is the probability that the first offspring from this cross: Aa bb Dd Ee x...

What is the probability that the first offspring from this cross: Aa bb Dd Ee x AA bb Dd Ee will be a son with the genotype: Aa bb DD ee Type your answer as a decimal and round to 6 decimal places.

Solutions

Expert Solution

To solve this problem we'll use the concept of product of independent probabilities.

Probability that Aa will be present in the son,P(Aa), will be determined using a Punnet square.

A a
A AA Aa
A AA Aa

Therefore P(Aa) = 2/4 = 1/2

Similarly P(bb) = 1 , as both the parents have bb genotype.

P(DD) =

D d
D DD Dd
d Dd dd

Thus P(DD) = 1/4

similarly for P(ee) = 1/4 (Punnet square will be same as that of Dd x Dd)

Thus the P(Aa bb DD ee) = (1/2).(1).(1/4)2

                                   = 1/32

                                     = 0.031250


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