A red snapdragon is crossed with a white snapdragon. All the offspring are pink. The pink snapdragons?

Question

A red snapdragon is crossed with a white snapdragon. All the offspring are pink. The pink snapdragons are allowed to self-pollinate. What percentage of the F2 generation will be pink?


100, 75, 50, or 25%

Answer 1

50%

Rr + Rr => 25% RR (red) + 50% Rr (pink) + 25% rr (white)

Answer 2

If the trait was codominant, some of the flowers (on the same plant) would be red and some would be white. This trait shows INCOMPLETE DOMINANCE. In codominance, both are expressed equally, but that is not the case in this scenario. The alleles for flower color are both expressed to some degree, resulting in a blend of the dominant and recessive phenotypes. In snapdragons, the R allele codes for some red pigment, but not enough to make the flower deep red by itself. Pure white snapdragons have two white R'R' alleles. Heterozygous snapdragons have one red (R) and one white (R') allele. They has a pink phenotype because the single R allele alone cannot make enough pigment for pure red color.

Answer 3

25% will be pink in the F2 Generation.

Answer 4

50% of the offspring are pink.

Parents: RR x WW
F1 = all RW pink
F2 = 1 red: 2 pink: 1 white
( 1 RR: 2 RW: 1 WW)

Answer 5

75% of the F2 generation wil be pink.

Answer 6

25%