Question

If a Tt plant is crossed with a Tt plant, what is the chance that a tt offspring will be produced? 75% 25% 50% 100%

Answer 1

Answer: the correct answer is 25%

T is the allele for tall plant, which is dominant trait. 't' is the allele for dwarf plant, which is a recessive trait.

Genotypes of the parent plants are- Tt and Tt. When they are crossed, there are 25% chances of producing tt offsprings. Refer the punnett square for this.

% of Offsprings with tt genotype = $\frac{1}{4} \times 100$

                                                      =  25%