Question

Assertion [A]: A geneticist crossed two plants. He got 50% tall and 50% dwarf plants in the progeny.

Reason [R]: One parent was heterozygous tall while the other was dwarf.

• A. Both A and R are true and R is the correct explanation of A.
• B. Both A and R are true but R is not the correct explanation of A.
• C. A is true but R is false.
• D. Both A and R are false.

Answer 1

The correct option is A Both A and R are true and R is the correct explanation of A.

$\bullet$ Taking T as the dominant character and t as the recessive characeter.
$\bullet$ When a heterozygous tall plant (Tt) is crossed with the recessive dwarf plant (tt), the result is as follows:
$\bullet$ From the above cross the possible genotypes of the offspring were: Tt and tt
$\bullet$ Thus, we can deduce from the above cross that there is a chance of having 50% tall and 50% dwarf plants amongst the offsprings.