Question

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.

Answer 1

(a) The gene for red petals is dominant, while the gene for white petals is recessive.
(b) The gene for red petals can be represented by R and the gene for white petals can be          represented by r.