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

question 54

Multiple Choice

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.

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Definitions:

Male Pipefishes

Marine fish species in which males are responsible for pregnancy and birth, showcasing a unique reversal of traditional reproductive roles.

Offspring Investment

The amount of resources (time, energy, food) an organism expends on the care and development of its young.

Mother Hypothesis

A theory suggesting that certain behaviors or traits in females, including those influencing fertility and offspring survival, have evolved due to maternal investment and efforts to ensure the propagation of genes.

Grandmother Hypotheses

A theory suggesting the evolutionary advantage of post-reproductive lifespan, where grandmothers aid in the survival of their grandchildren.