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Gametogenesis $\to$ Syngamy $\to$ Gamete transfer $\to$ Zygote $\to$ Cell division (Cleavage) $\to$ Cell differentiation $\to$ Organogenesis

Gametogenesis $\to$ Gamete transfer $\to$ Syngamy $\to$ Zygote $\to$ Cell division (Cleavage) $\to$ Organogenesis $\to$ Cell differentiation

Gametogenesis $\to$ Gamete transfer $\to$ Syngamy $\to$ Zygote $\to$ Cell differentiation $\to$ Cell division (Cleavage) $\to$ Organogenesis

Gametogenesis $\to$ Gamete transfer $\to$ Syngamy $\to$ Zygote $\to$ Cell division (Cleavage) $\to$ Cell differentiation $\to$ Organogenesis

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Detailed Solution

Gametogenesis → Gamete transfer → Syngamy → Zygote → Cell division (Cleavage) → Cell differentiation → Organogenesis

Gametes are formed in the gonads (gametogenesis). Sperm are transferred into the female reproductive tract during coitus (insemination/gamete transfer). Fertilisation results in the formation of a zygote. Zygote undergoes a series of mitotic divisions (cleavage) to form blastomeres. All the blastomeres are initially alike. Later, the unspecialised, totipotent cells transform into various specialised cell types (cell differentiation).
The cells and tissues organise into specifi c organs and organ systems (organogenesis).

(2) Organogenesis occurs after cell differentiation.

(3) Syngamy (fertilisation) occurs after gamete transfer (insemination).

(4) Cell differentiation occurs only after several cells are formed from zygote by cleavage (cell division).

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