In four o' clock plants, the gene for red flower colour (R) is incompletely dominant over the gene for white flower colour (r), hence the plants heterozygous for flower colour (Rr) have pink flowers. What will be the ratio of offsprings in a cross between red flowers and pink flowers ?

Question

In four o' clock plants, the gene for red flower colour (R) is incompletely dominant over the gene for white flower colour (r), hence the plants heterozygous for flower colour (Rr) have pink flowers. What will be the ratio of offsprings in a cross between red flowers and pink flowers ? (A) 75 % red flowers, 25 % pink flowers (B) All red flowers (C) 50 % red flowers, 50 % pink flowers (D) Red: pink: white :: 1 :2 :1

Tardigrade Admin · Accepted Answer

Incomplete dominance is reported in flowers of Mirabilis jalapa (Four o'clock). When red flowers are crossed with pink flowers, 50 % red flowers and 50 % pink flowers are obtained.

Q. In four $o$ ' clock plants, the gene for red flower colour $(R)$ is incompletely dominant over the gene for white flower colour $(r)$ , hence the plants heterozygous for flower colour $(R r)$ have pink flowers. What will be the ratio of offsprings in a cross between red flowers and pink flowers ?

$75%$ red flowers, $25%$ pink flowers

All red flowers

$50%$ red flowers, $50%$ pink flowers

Red : pink : white :: $1 : 2 : 1$

Incomplete dominance is reported in flowers of Mirabilis jalapa (Four $o$ 'clock). When red flowers are crossed with pink flowers, $50%$ red flowers and $50%$ pink flowers are obtained.

Q. In four o' clock plants, the gene for red flower colour (R) is incompletely dominant over the gene for white flower colour (r), hence the plants heterozygous for flower colour (Rr) have pink flowers. What will be the ratio of offsprings in a cross between red flowers and pink flowers ?

75% red flowers, 25% pink flowers

All red flowers

50% red flowers, 50% pink flowers

Red : pink : white :: 1:2:1

Incomplete dominance is reported in flowers of Mirabilis jalapa (Four o'clock). When red flowers are crossed with pink flowers, 50% red flowers and 50% pink flowers are obtained.

$75%$ red flowers, $25%$ pink flowers

$50%$ red flowers, $50%$ pink flowers

Red : pink : white :: $1 : 2 : 1$

Incomplete dominance is reported in flowers of Mirabilis jalapa (Four $o$ 'clock). When red flowers are crossed with pink flowers, $50%$ red flowers and $50%$ pink flowers are obtained.