In a certain plant, yellow fruit colour ( Y ) is dominant to green fruit colour ( y ) and round shape ( R ) is dominant to oval shape ( r ). The two genes involved are located on different chromosomes

Question

In a certain plant, yellow fruit colour ( Y ) is dominant to green fruit colour ( y ) and round shape ( R ) is dominant to oval shape ( r ). The two genes involved are located on different chromosomes. Identify the outcome of this particular cross when a plant with genotype YyRr is back-crossed with the double recessive parent?

TestHub · Accepted Answer

When YyRr is crossed with a double recessive parent then genotypic and phenotypic ratio will be $1 : 1 : 1 : 1$ .

Phenotypic ratio $= 1$ yellow round: $1$ yellow oval: $1$ green round: $1$ green and oval. This represents a test cross.

Zoology - Principles of Inheritance and Variation Question with Solution | TestHub

Options:

Doubts & Discussion