(i) A husband has 46 chromosomes, his wife has 46 chromosomes. Then why don't their offsprings have 46 pairs of chromosomes, which is obtained by the fusion of male and female gametes?
(ii) "Geographical isolation is not a major factor in the speciation of a self pollinating plant species." Justify this statement with the help of an example.

Explanation

(i) Male individual has 46 chromosomes but because the gametes are always haploid 1.e., they have half the number of chromosomes, sperms will be haploid (23 chromosomes). Female individual also contains only 23 chromosomes in egg. It is the fusion of this sperm and egg which leads to an offspring with 46 chromosomes.
(ii) Geographical isolation will not be a major factor in the speciation of a self-pollinating plant species. It involves the same flower / plant from where male and female gametes are formed.