Question

A TtYy pea plant self-pollinates and one seed is picked at random for planting. (a) What is the chance that the seed will produce a tall, green seeded pant? (b) If it turn out to be tall and yellow seeded what is the chance that its genotype is TTYY.​

Answer 1

Answer:

a) 3/16 b) 1/9

Explanation:

a) ratio for dihybrid cross is 9:3:3:1 for tall-yellow:tall-green:short-yellow:short-green. so probablity is 3/(9+3+3+1) = 9/16

b) there are 9 possible genotypes of tall-yellow (as seen from the ratio). out of them TTYY is only one possible type. (it occurs once) so answer is 1/9.

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