Question

Assertion (A): In Mirabilis jalapa (4 o'clock plant), a cross between Red flowered plant and White-flowered plant (both homozygous) produced Pink flowered plant in F₁ generation.

Reason (R): In this plant, flower colour is controlled by pleiotropic genes

विकल्प

• Both A and R are true and R is not the correct explanation of A.

• Both A and R are true and R is the correct explanation of A.

• A is true and R is false.

• Both A and R are false.

Answer 1

A is true and R is false.

Explanation:

Exhibits Mirabilis jalapa (4 o'clock plant) Complete dominance is not possible. Both of an allelomorphic pair's genes, Red (R) and White (r), express themselves to some extent. As a result, the F₁ hybrid is a Pink-flowering plant that falls in between the Red and White forms.