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A tall plant with red flowers (TrRr) is ...

A tall plant with red flowers (TrRr) is self pollinated. Represent the plants obtained in `F_2` generation with the help of a checker board (Punnet square). The traits which are not found in the parental plants are expressed in the offspring. Why?

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PR:9:3:3:1
GR:1:2:2:4:1:2:1:2:1
ii) Due to variation (mixing up of genes) new traits are formed.
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