Mendel observed that all $F_1$ progeny plants:

Given below are two statements:
Statement $I$:
Mendel studied seven pairs of contrasting traits in pea plants and proposed the Laws of Inheritance.
Statement $II$:
Seven characters examined by Mendel in his experiment on pea plants were seed shape and colour,flower colour,pod shape and colour,flower position and stem height.
In the light of the above statements,choose the correct answer from the options given below:

Mendel selected pea plants for his experiments because of $..........$.

In $Pisum$ $sativum$,there are $14$ chromosomes. How many pairs with different chromosomal composition can be prepared?

Which of the following periods represents the duration of Mendel's hybridization experiments?

The person famous for experimental genetics is: