Which of the following best explains the single yellow pea producing plant in the F₁ generation?

(A) Crossing-over occurred in the parental pea plant to provide genetic variation.
(B) The law of independent assortment: one homologous pair separated independently of the others during gamete production in the parental pea plant.
(C) Nondisjunction in one of the parental pea plants caused an imbalance in chromosome distribution.
(D) A DNA polymerase error occurred during DNA replication just prior to meiosis.

In a species of peas, green (G) peas are known to be classically dominant over yellow (g) peas. A true breeding green plant and a true breeding yellow plant are crossed. The resulting F₁ generation is evaluated, and its phenotype distribution is shown in Table 1. Two green pea producing members of the F₁ generation are then crossed, and the resulting F₂ generation phenotype distribution is shown in Table 2.

Transcribed Image Text:

Table 1. F, Generation Type of Peas Produced Green Yellow Table 2. F, Generation Type of Peas Produced Green Yellow # of Plants 1,432 1 # of Plants 1,196 374