Select the wrong statement:

1. Anisogametes differ either in structure, function or behaviour.
2. In Oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile.
3. Chalmydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy
4. Isogametes are similar in structure, function and behaviour.

In oomycetes female gamete is large and non motile while male gamete is small & motile.