Question

Which of the following is/are correct regarding Punnett square?
A. The possible gametes are written on the left column and bottom row.
B. It helps determine the number of genes controlling a given trait.
C. The possible gametes are written on the left column and top row.
D. It helps predict the outcome of a genetic cross.

• A. A, B
• B. A, D
• C. C, D
• D. B, D

Answer 1

The correct option is C C, D

A Punnett square is used to predict the outcome of a genetic cross.
A British geneticist, Reginald C. Punnett developed Punnett square. It is a graphical representation to calculate the probability of all possible combinations of genotypes of offsprings in a genetic cross.
The possible gametes from male parent and female parent are written on the left column and top row respectively or vice versa.
It is not possible to determine the number of genes controlling a given trait using Punnett square.