Which of the following sequences correctly represents the series of events that take place during sexual reproduction?

Options

A. Gametogenesis- Gamete transfer-Fertilisation - Zygote formation - Embryogenesis
B. Gamete transfer- Fertilisation - Gametogenesis- Zygote formation- Embryogenesis
C. Fertilisation - Zygote formation - Gamete transfer - Gametogenesis - Embryogenesis
D. Zygote formation- Gametetransfer- Embryogenesis- Fertilisation - Gametogenesis

Answer

To determine the correct sequence of events that take place during sexual reproduction, we can break down the process into distinct steps. Here’s the step-by-step solution:

### Step 1: Gametogenesis
The first step in sexual reproduction is **gametogenesis**. This is the process by which male and female gametes (sperm and egg cells) are produced.

### Step 2: Gamete Transfer
After gametogenesis, the next step is **gamete transfer**. This involves bringing together the male and female gametes to facilitate fertilization.

### Step 3: Fertilization
Once the gametes are transferred, the third step is **fertilization**. This is the process where the male gamete (sperm) fuses with the female gamete (egg), resulting in the formation of a zygote.

### Step 4: Zygote Formation
Following fertilization, the next step is **zygote formation**. The zygote is the single cell that results from the fusion of the sperm and egg.

### Step 5: Embryogenesis
The final step is **embryogenesis**. This is the process of development where the zygote undergoes multiple divisions and differentiations to develop into an embryo.

### Summary of the Correct Sequence
So, the correct sequence of events during sexual reproduction is:
1. Gametogenesis
2. Gamete Transfer
3. Fertilization
4. Zygote Formation
5. Embryogenesis

### Conclusion
The correct answer to the question is that the sequence of events is: **Gametogenesis → Gamete Transfer → Fertilization → Zygote Formation → Embryogenesis**.

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