Question

In maize the colour of grains is controlled by
3 pairs of genes. Gene 'C' and 'R' independently
do not form any colour but when together,
they impart greenish-brown colour to the
stem, while the grains remain colourless. In
presence of an additional allele 'A' the stem
as well as grains become violet. In a trihybrid
cross what phenotypic ratio is expected in
grains?
A) 48 coloured : 16 colourless
(B) 36 coloured : 28 colourless
(C) 27 coloured : 37 colourless
(D) 40 coloured : 24 colourless​

Answer 1

Answer:

(a) is correct

Explanation:

in maize the colour of grains is controlled by

3 pairs of genes. Gene 'C' and 'R' independently

do not form any colour but when together,

they impart greenish-brown colour to the

stem, while the grains remain colourless. In

presence of an additional allele 'A' the stem

as well as grains become violet. In a trihybrid

cross what phenotypic ratio is expected in

grains?

A) 48 coloured : 16 colourless

(B) 36 coloured : 28 colourless

(C) 27 coloured : 37 colourless

(D) 40 coloured : 24 colourless​