Question

At the end of your biology class, your professor asks you to develop a project to determine the genotype of a plant with red flowers. Red petal color (R) is dominant to pink flower color (r). To accomplish this task, you cross the plant with the unknown genotype with heterozygous red-flowered plants.

1. Which of the following are valid predictions of the ratio of flower colors in the offspring?
O all pink flowers
O all red flowers
O 1 red : 3 pink flowers
O 3 red : 1 pink flowers

Answer 1

Answer: the answer is 3red: 1pink flowers .

Explanation: A petal colour R is dominant to pink flower r =Rr .while crossing it with a heterozygous red flowered plant =Rr.

Ie: R r

R RR Rr

r Rr rr

The ratio of the flower colour is 3 red flowers and 1 pink