Mendel proposed which of the following terms for hereditary units?

Define/Explain the following terms:
$1.$ Offspring
$2.$ Phenotype

$A$ cross in which an organism showing a dominant phenotype is crossed with the recessive parent in order to know its genotype is called

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.

On which of the following plants did Mendel perform his experiments?

Choose the incorrect pair for the characters studied by Mendel.