Question

Conducting a monohybrid cross of F1 generation plants, the recessive trait reappears in F2 plants in a ratio of _____.

A. 1:1

B. 2:1

C. 3:1

D. 4:1

Answer 1

Answer: The correct answer for the blank is-

C. 3:1

Monohybrid cross is a genetic cross between two organisms, which are having pure homozygous genotype for one contrasting character/ trait ( such as between tall and dwarf height of pea plant).

This means that parents are pure breeding (TT and tt for tall and dwarf respectively) for a contrasting trait.

Parents - TT and tt will produce all offspring with the genotype Tt ( tall, as T is a dominant allele that depicts tall plant height and masks the dwarf plant height when present with t allele, which is for dwarf height).

When plants of F1 generation ( that is Tt and Tt) are crossed, they will produce offspring in the ration 3: 1 ( tall: dwarf) in F2 generation.

Refer punnet square.

Answer 2

Conducting a monohybrid cross of F1 generation plants, the recessive trait reappears in F2 plants in a ratio of 3.1.

A monohybrid is a hybrid that is heterozygous with respect to a specified gene.

The correct answer between all the choices given is the third choice or letter C. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.