Question

Q.3. You are given a red flower . How will you figure out that either it is hybrid or not? Draw the whole scheme and choose methodology to infer it and give justification of your selection?   

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Answer 1

Let us take Red colour is dominant over white flower and incomplete dominance is not happening.

And take allele R is dominant over r.

And we have red flower which can either Rr or RR.

So we can identify it by test cross with rr, white flower and can obtained from progenies genotype.

Let take if the flower is RR and then cross with rr.

Then the gemetes are R and r. So all progenies having genotype Rr which is red.

And when the red flower is Rr, then we are crossing with rr, the the probable progenies are

Rr and rr.

That is there is 1/2 probability to get each phenotype.