Recall that in pea plants,purple flower color is dominant and white is recessive.If two heterozygous plants are crossed,what is the probability that the first two offspring will have purple flowers?
A) 1/2
B) 1/4
C) 6/4
D) 9/16
E) 1/16

Question

Quizplus · Accepted Answer

When two heterozygous plants are crossed, their genotypes would be Pp x Pp. Using a Punnett square to calculate the probability of their offspring genotypes, we get PP, Pp, Pp, and pp. 
Thus, there is a 3/4 or 0.75 probability of getting a plant with purple flowers (either homozygous dominant or heterozygous). 
To calculate the probability of the first two offspring having purple flowers, we need to multiply the probabilities together:

P(purple flower for first offspring) x P(purple flower for second offspring) = (3/4) x (3/4) = 9/16

Therefore, the probability of the first two offspring having purple flowers is 9/16.

Recall That in Pea Plants,purple Flower Color Is Dominant and White