Dominant epistasis is shown by

The offspring from a cross between two individuals differing in at least one set of characters is called

Which of the following statements are false?
$I.$ $A$ dominant allele determines the phenotype when paired with a recessive allele.
$II.$ $A$ recessive allele is weaker than a dominant allele.
$III.$ $A$ recessive allele does not show its effects when paired with a dominant allele.
$IV.$ $A$ dominant allele is always better for an organism.

Which of the following is an exception to Mendelism?

Theoretically,the phenotype is expressed only when an enzyme converts a substrate into its product. During which of the following conditions is the phenotype affected?

Match the terms in column-$I$ with their description in column-$II$ and choose the correct option.

Column-$I$	Column-$II$
$(A)$ Dominance	$(i)$ Many genes govern a single character
$(B)$ Codominance	$(ii)$ In a heterozygous organism only one allele expresses itself
$(C)$ Pleiotropy	$(iii)$ In a heterozygous organism both alleles express themselves fully
$(D)$ Polygenic inheritance	$(iv)$ $A$ single gene influences many characters