Which of the following statements correctly describes how Mendel accounted for the observation that traits had disappeared in the F₁ generation and then reappeared in the F₂ generation? A) New mutations were frequently generated in the F₂ progeny, causing traits that had been lost in the F₁to reappear in the F₂. B) The mechanism controlling the appearance of traits was different between the F₁ and the F₂plants. C) Traits can be dominant or recessive and the recessive traits were 'hidden' by the dominant ones in the F₁. D) Members of the F₁generation had only one allele for each trait, but members of the F₂ had two alleles for each trait.

Question

Quizplus · Accepted Answer

Mendel proposed that traits can be dominant or recessive and the recessive traits were 'hidden' by the dominant ones in the F1. This explains why traits seemed to disappear in the F1 and reappear in the F2 generation when the recessive allele was present in the F1 individuals and paired with another recessive allele in the F2 generation. Thus, the mechanism controlling the appearance of traits was the same in both generations, but the presence of both dominant and recessive alleles determined whether they were expressed or not.

Which of the Following Statements Correctly Describes How Mendel Accounted