To determine the genotype of an offspring,which cross should be performed?

In his classic experiments on pea plants, Mendel did not use

What will a hybrid plant resulting from two alternative alleles be called?

Which of the following is considered as a recessive character of Mendel?

Mendelism is the genetics of $.....$.

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.