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Multiple Choice
Which conclusion did Mendel draw from observing the F2 generation in his pea plant crosses?
A
All offspring in the F2 generation display only the dominant trait.
B
Environmental factors are the primary cause of trait variation in the F2 generation.
C
Each parent contributes only dominant alleles to the F2 generation.
D
Traits are inherited as discrete units that do not blend together.
Verified step by step guidance
1
Recall Mendel's experiments involved crossing pea plants and observing traits across generations, particularly the F1 and F2 generations.
Understand that in the F1 generation, Mendel observed that all offspring showed the dominant trait, which suggested dominance of one allele over another.
Examine the F2 generation, where Mendel noticed a reappearance of the recessive trait in a specific ratio, indicating that traits do not blend but segregate.
From this observation, Mendel concluded that traits are inherited as discrete units (now called genes), which remain separate rather than blending together.
This led to the principle of segregation, stating that each parent contributes one allele for each trait, and these alleles separate during gamete formation.