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Solution


Q.

Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be:
1 Double fertilisation  
2 Self pollination  
3 Cross fertilisation  
4 No fertilisation  

Ans.

(3)

The cross described in the question is a typical Mendelian genetic cross showing incomplete dominance, where the offspring display a 1:2:1 phenotypic ratio (1 red, 2 pink, 1 white). Among the given options, "Cross fertilisation" (This involves the fertilisation of an organism with the gametes from another organism. It typically refers to the process between two different plants, not necessarily describing the specific genetic inheritance pattern observed) is the most applicable.