Arrange the following events of sexual reproduction in the sequence of their occurrence
I. Gamete transfer
II. Zygote formation
III. Embryogenesis
IV. Gametogenesis

Options

A. IV, I, II, III
B. I, III, II, IV
C. III, IV, I, II
D. II, I, IV, III

Answer

To arrange the events of sexual reproduction in the correct sequence, we will analyze each event step by step.

### Step-by-Step Solution:

1. **Gametogenesis (IV)**: The first step in sexual reproduction is the formation of gametes, which occurs through a process called gametogenesis. During this process, diploid gamete mother cells undergo meiosis to produce haploid gametes.

2. **Gamete Transfer (I)**: Once the gametes are formed, the next step is the transfer of these gametes. This typically involves the transfer of male gametes (sperm) to the female gametes (egg) for fertilization. This is the second event in the sequence.

3. **Zygote Formation (II)**: After the gametes are transferred, the male and female gametes fuse during fertilization, resulting in the formation of a zygote. This is the third event in the sequence.

4. **Embryogenesis (III)**: Finally, the zygote undergoes a series of developmental processes to form an embryo. This process is known as embryogenesis and is the last event in the sequence.

### Final Sequence:
The correct order of events is:
- IV. Gametogenesis
- I. Gamete Transfer
- II. Zygote Formation
- III. Embryogenesis

Thus, the final arrangement of the events is: **IV, I, II, III**.