Use the following information to answer the questions below.
Two true-breeding stocks of pea plants are crossed. One parent has red, axial flowers and the other has white, terminal flowers; all F₁ individuals have red, axial flowers. The genes for flower color and location assort independently.
-Among the F₂ offspring, what is the probability of plants with white axial flowers?
A) 9/16
B) 1/16
C) 3/16
D) 1/8
E) 1/4

Question

Quizplus · Accepted Answer

The traits segregate independently, so we calculate the probability of each trait separately and then multiply them. For flower color, red (R) is dominant over white (r), and for flower location, axial (A) is dominant over terminal (a). The F₁ generation, all RrAa, produces gametes that combine in the F₂ generation. The probability of white flowers (rr) is 1/4, and the probability of axial flowers (A-) is 3/4 (AA or Aa). Multiplying these probabilities gives 1/4 * 3/4 = 3/16.

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