Question

Ravi is studying the inheritance of two traits: stem height and stem color. Tall and brown is dominant over short and green. Ravi wants to do a test cross to determine the genotype of a tall, brown F${}_1$ hybrid individual. Which of the following will be the height and color of the other plant he used in test cross?

• A. Tall and brown
• B. Tall and green
• C. Short and brown
• D. Short and green
• E. It does not matter; any of the above will work

Answer 1

Answer: (D)

Short and green

Tall and brown is dominant over short and green. Ravi wants to do a test cross to determine the genotype of a tall, brown F1 hybrid individual. When the test cross is performed, the genotype of the unknown plant is to be determined. The cross is performed with homozygous recessive parent. So, here the homozygous recessive parent will have short and green stem.

Thus, the correct answer is option 'Short and green'.