Gynaecomastia condition can develop due to

In a gene pool, along with beneficial mutations those mutations also exists which are damaging to an individual. It has been found that these mutations are irreversible because

$I.$ they have survival value

$II.$ they are acquired

$III.$ they are recessive and carried by heterozygous individuals only

$IV.$ they show genetic drift

Choose the incorrect option for given statement

Definitions / Explanation : Complementary Gene
 

Kappa particles indicate

Blood bank of the body or reservoir where the blood is stored and can be mobilized, is

Which type of pollination method was adopted by Mendel in his experiment?