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The Punnett Tool

In Mirabilis,...

Question

In Mirabilis, red (RR) and white (rr) flower produces pink (Rr) flower. A plant with pink flower is crossed with a white flower the expected phenotypic ratio is

A

Red : pink : white (1 : 2: 1)

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B

Pink : white (1 :1)

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C

Red : pink (1 : 1)

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D

Red : white (3:1)

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Solution

The correct option is B Pink : white (1 :1)
Red flower plant fuses with white flower plant.
Genotype : Red (RR) x White (rr)
Gametes : R r
Rr (Pink) showing incomplete dominance

Rr (Pink) x rr (White)

R r
r Rr rr
r Rr rr
50% Pink & 50% White (1 : 1)
Thus, the correct answer is Option B.

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