AP BIOLOGY

HEREDITY

INCOMPLETE DOMINANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Radish color is completely dominant, red and white are pure breeding colors. While heterozygous are purple.Cross a red radish with a white. What is the phenotypic ratio?
A
4 purple
B
1 red, 2 purple, 1 white
C
2 red, 2 white
D
1 red, 1 purple, 2 white
Explanation: 

Detailed explanation-1: -From the Punnet square, the phenotype of the F2 generation will be 1 red radish (RR), 2 purple radishes (Rr), and 1 white radish (rr).

Detailed explanation-2: -So the correct answer to our question about the expected phenotypic ratio of a dihybrid cross between two heterozygous individuals is (A) nine to three to three to one.

Detailed explanation-3: -The crossing of a red flowered plant and a white flowered plant produces all the offspring with pink flowers. This cross illustrates red and white exhibit incomplete dominance. This situation occurs due to the blending of both the alleles.

Detailed explanation-4: -In radishes, the gene that controls color exhibits incomplete dominance. Pure-breeding red radishes crossed with pure-breeding white radishes make purple radishes.

Detailed explanation-5: -Radish color is completely dominant, red and white are pure breeding colors. While heterozygous are purple. Cros a red radish with a purple.

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