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Principles Of Inheritance And Variation

Question
CBSEENBI12000250

In four o’clock plants, red colour (R) is incompletely dominant over white (r), thus the heterozygous has pink colour. What will be the offspring in a cross between red flower and a pink flower plant?

Solution

In Four O' clock plant red (R)colour is incompletely dominant over white (r). So plant having pink phnotype will have Rr genotype. 
We cross a red plant (RR) with pink plant (Rr) we get-:
50% plants with red flowers
50% plants with pink flowers.