Allelic genes are located on:

Fruit flies $(Drosophila \text{ } melanogaster)$ are one of the best materials for genetic studies because of all, except:

Mendel chose the pea plant to study genetics because of many qualities. One of them which he did not consider was

Which of the following statements is correct?

Mendel's work remained unrecognized for a long time due to:
$I.$ Communication was not easy.
$II.$ The concept of factors which did not blend was not accepted.
$III.$ The use of mathematics to explain biological problems was unacceptable.
$IV.$ He could not provide any physical proof for the existence of factors.
Choose the right combination.

How many traits of the pea pod were studied by Mendel?