In human beings the correct sequence of the events during reproduction is

Options

A. zygote, gamete formation, fertilisation, embryo
B. gamete formation, fertilisation, zygote, embryo
C. gamete formation, zygote, fertilisation, embryo
D. gamete formation, fertilisation, embryo, zygote

Explanation

### Step-by-Step Solution:

1. **Gamete Formation**: The first step in human reproduction is the formation of gametes. In humans, there are two types of gametes: sperm (male gamete) and egg (female gamete). These cells are produced through a process called gametogenesis.

2. **Fertilization**: The next step is fertilization, which occurs when a sperm cell successfully fuses with an egg cell. This fusion results in the formation of a single cell called a zygote.

3. **Zygote Formation**: After fertilization, the zygote is formed. The zygote is a diploid cell, meaning it contains two sets of chromosomes (one from each parent). This is the first stage of a new organism.

4. **Embryo Development**: Following the formation of the zygote, it begins to divide and develop into an embryo. The embryo is the early stage of development for a multicellular organism and will eventually develop into a fetus.

### Correct Sequence:
1. Gamete Formation
2. Fertilization
3. Zygote Formation
4. Embryo Development

### Final Answer:
The correct sequence of events during reproduction in human beings is:
1. Gamete Formation
2. Fertilization
3. Zygote Formation
4. Embryo Development

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