Answer:
The correct answer is 2) Meiosis and differentiation of gamets
Step-by-step explanation:
Gametogenesis is an important process of development which deals with the division and differentiation of diploid(2n number of chromosome) precursor cell to generate haploid gamets.
During gametogenesis meiotic division of diploid gametocytes occur to form haploid gamets. The haploid gamets then fuses with each other to form diploid zygote.