In a certain plant, yellow fruit colour (Y) is dominant over green fruit colour (y) and round shape (R) is dominant over oval shape (r). The two genes involved are located on different chromosomes.
Which of the following will result when a plant - YyRr is self-pollinated?

9:3:3:1 ratio of phenotypes only

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

9:3:3:1 ratio of genotypes only

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1:1:1:1 ratio of phenotypes only

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1:1:1:1 ratio of phenotypes and genotypes

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B 9:3:3:1 ratio of phenotypes only
When two plants with the genotype YyRr are self-pollinated, phenotypes of the resultant offspring will be:
Yellow round - 9
Yellow oval - 3
Green round - 3
Green oval - 1
So, the phenotypic ratio stands out to be 9:3:3:1.
Thus, the correct answer is option A.

Suggest Corrections

Similar questions

Q. Choose the correct answer from the alternatives given.
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.
Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?

Q. A yellow round seeded Pea plant is crossed with green wrinkled seeded Pea plant. Four phenotypes appeared in the progeny in the ratio of 1 : 1 : 1 : 1. The genotype of the two are

In a plant, red colour fruit is dominant over yellow colour. When these two pure lines are crossed, the probability of producing $F_{2}$ homozygous plants with red fruits, heterozygous plants with red fruits, and plants with yellow coloured fruits respectively is

Q. In a plant species, flower colour yellow is dominant over white, and fruit shape round is dominant over elongated. Crossing was performed between two pure lines-one having yellow-flower and round-fruit and another with white flower and elongated-fruit. About