Using the consistent pattern of results in the monohybrid crosses, Mendel derived which of the following postulates?
(a) Genetic characters are controlled by unit factors existing in pairs in individual organisms.
(b) During the formation of gametes, the paired unit factors separate, or segregate, randomly so that each gamete receives one or the other with equal likelihood.
(c ) When two unlike unit factors responsible for a single character are present in a single individual, one unit factor is dominant to the other, which is said to be recessive.
(d) During gamete formation, segregating pairs of unit factors assort independently of each other.

detailed solution

Correct option is B

Using the consistent pattern of results in the monohybrid crosses, Mendel derived the following three postulates, or principles, of inheritance:(a) Unit factors occur in pairs- Genetic characters are controlled by unit factors existing in pairs in individual organisms.(b) When two unlike unit factors responsible for a single character are present in a single individual, one unit factor is dominant to the other, which is said to be recessive.(c ) During the formation of gametes, the paired unit factors separate, or segregate, randomly so that each gamete receives one or the other with equal likelihood.The law of independent assortment is obtained from dihybrid cross.