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NEET BIOLOGYMedium

A pink flowered Snapdragon plant was crossed with red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?

A

Red flowered as well as pink flowered plants

B

Only pink flowered plants

C

Red, Pink as well as white flowered plants

D

Only red flowered plants

Step-by-Step Solution

, the inheritance of flower colour in Snapdragon (Antirrhinum sp.) is a classic example of incomplete dominance. The genotypes are: Red (RR), White (rr), and Pink (Rr) . The question asks for a cross between a Pink plant (heterozygous, Rr) and a Red plant (homozygous, RR).

Cross: Rr (Pink) × RR (Red)

  • Gametes from Pink: R, r
  • Gametes from Red: R
  • Offspring Genotypes: RR and Rr
  • Offspring Phenotypes: Red and Pink

Therefore, the progeny will consist of red flowered as well as pink flowered plants .

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