A plant has two varieties, one with red petals and the other with white petals. When these two varieties are cross-pollinated, all the offsprings have red petals?(a) Which gene is dominant?
(b) Choose suitable letters to represent the two genes.

A plant has two varieties: Red petals (RR) & White petals (rr)

When these varieties were cross-pollinated, F1 generation: All Red petals (Rr)

Therefore,

(a) Red petal gene is dominant over white petal gene.

(b) The gene for red petal can be denoted by R and gene for white petal can be denoted by r.

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Updated on: 21-Mar-2023

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