In a cross between pure-breeding tall plants with pure-breeding short plants, all of the F₁ are tall.When these plants are allowed to fertilize themselves, the F₂ plants occur in a ratio of 3 tall:1 short.Which of the following is NOT a valid conclusion from these results? A)The allele that produces the tall condition is dominant to the allele that produces the short condition. B)The difference between tall and short stature in these lines is controlled by a single gene pair. C)During production of gametes in F₁ plants, the tall and short alleles segregate from each other equally into the gametes. D)The tall and short traits assort independently of each other in this cross. E)Fertilization occurs randomly between gametes carrying the tall and short alleles.

Question

Quizplus · Accepted Answer

The ratio of 3 tall:1 short in the F₂ plants indicates that the tall and short traits are segregating together in a 3:1 ratio, which means they are not assorting independently (as indicated in choice D). The other choices are all valid conclusions from the results.

In a Cross Between Pure-Breeding Tall Plants with Pure-Breeding Short