In a monohybrid cross of plants with red and white flowered plants, Mendel got only red flowered plants. On self-pollinating these F1 plants got both red and white flowered plants in 3:1 ratio. Explain the basis of using RR and rr symbols to represent the genotype of plants of parental generation.
On crossing red (RR) and white(rr) flowered plants, Mendel got only red flowered plants with genotype Rr. This is the filial progeny (F1) or plants of the 1st hybrid generation. F1 always resembled either one of the parents and the trait of other parent was not seen in them.
Now on self-pollinating these F �1 plants (that is Rr x Rr) he got some of the offspring’s of Filial2 generation to be white; which was not seen in F1 was now expressed. The red and white traits were identical to their parental type and did not show any blending (none was of pink colour). F2 stage , both the traits were expressed in the proportion 3:1.
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