Snapdragons occur in nature as either green or yellow plants. A green snapdragon is homozygous and has the genotype CC. A yellow

Question

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Snapdragons occur in nature as either green or yellow plants. A green snapdragon is homozygous and has the genotype CC. A yellow

snapdragon is heterozygous and has the genotype Cc. Suppose that a gardener crosses two yellow snapdragons, and one-third of the offspring are green and two-thirds of the offspring are yellow.
What type of allele could be responsible for the 2:1 offspring ratio seen when two yellow snapdragons are crossed?

A. dominant allele
B. polymorphic allele
C. recessive lethal allele
D. codominant allele

Biology

1 answer:

s2008m [2.3K] · Answer 1 · 2026-03-25T07:27:44+03:00

Answer:

Snapdragons can be found in nature as either green or yellow variants. A green snapdragon is homozygous with a genotype of CC, and a yellow snapdragon is heterozygous with the genotype Cc. Let's say a gardener crosses two yellow snapdragons, resulting in one-third of the offspring being green and two-thirds yellow.

What kind of allele might account for the 2:1 offspring ratio observed when two yellow snapdragons are bred?

dominant allele

Explanation:

The crossing of two yellow snapdragons provides evidence that the dominant yellow allele is responsible for the resulting proportion where yellow predominates over green, leading to two-thirds yellow and one-third green offspring.