The matured sex cell which takes part in sexual reproduction is referred to as

Step 1: Analyze the question The question asks for the name of a mature sex cell that takes part in sexual reproduction.

Step 2: Explain the concept In sexual reproduction, two specialised reproductive cells fuse. These cells are called gametes:

• Male gamete: sperm cell (in animals) or pollen nucleus (in plants)
• Female gamete: egg cell/ovum (in animals) or ovule/egg cell (in plants)

Gametes are produced by meiosis, so they are haploid (n). When they fuse during fertilisation, the diploid (2n) number is restored.

Step 3: Check each option

• A. Gamete: a mature sex cell that fuses with another during fertilisation. ✔
• B. Fetus: a developing baby in the womb, from about 8 weeks until birth. ✘
• C. Embryo: the early developing organism after the zygote starts dividing. ✘
• D. Zygote: the single cell formed after the male and female gametes fuse. It is the result of fertilisation, not a cell that takes part in it. ✘

Step 4: Answer The correct option is A. gamete.

Tip: Remember the sequence Gamete → Zygote → Embryo → Fetus. Gametes come first, and they are the "players" in fertilisation. The others are the products or later stages. Whenever you see "mature sex cell", think gamete.