Reproduction in Organisms

In oogamy, fertilization involves

1. a small non-motile female gamete and a large motile male gamete
2. a large non-motile female gamete and a small motile male gamete
3. a large non-motile female gamete and a small non-motile male gamete
4. a large motile female gamete and a small non-motile male gamete.

Answer

(2) a large non-motile female gamete and a small motile male gamete

Solution

As per NCERT (Plant Kingdom), fusion between one large, non-motile (static) female gamete and a smaller, motile male gamete is termed oogamous, e.g. Volvox, Fucus.

⇒ The egg is large and non-motile; the antherozoid / sperm is small and motile.

∴ Oogamy involves a large non-motile female gamete and a small motile male gamete.

Answer: (2)