a. Write the conclusions Mendel arrived at on dominance of traits on the basis of monohybrid crosses that he carried out in pea plants.
b. Explain why a recessive allele is unable to express itself in a heterozygous state.
a. (1) Characters are controlled by discrete unit called factors.
(2). Factors occur in pair.
(3) In a dissimilar pair of factors one member of the pair dominates/only one of the parental character is expressed in a monohybrid cross in the ${{F}{1}}$ and both are expressed in the
${{F}{2}}$.
b.Due to non-functional enzyme / less efficient enzyme / non-enzyme at all.