The correct answer is Zygote. Explanation & Key Takeaways: • The fusion of the male gamete and female gamete is called fertilization. • Fertilization of gametes results in the formation of a zygote. • Gamete formation: These are cells used during sexual production. The male gamete is sperm while the female gamete is the egg or ova. • Fertilization: This is the process where the male and female gametes fuse to form a single cell called a zygote. • Zygote: This is the combination of the parent gene(male and female gene) formed during fertilization. • It contains the necessary genetic information to form a new human being. • Embryo: This is the early stage of development of the new individual. • The correct sequence of events is during reproduction in human beings. Gamete formation → Fertilization → Zygote → Embryo