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difference between anisogamous and oogamous?

@veera: your friend noorash has given right answers.

@noorash: Correct answers....keep it up..!!!!

However, I would like to elaborate your answer.

Actually oogamy is a form of anisogamy found predominantly in animals where female gamete is larger in size and non-motile while male gamete is smaller in size and highly motile.

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hiii veeralakshmi..

In anisogamous form of sexual reproduction the male and female gametes are of different shapes or sizes.

In oogamous form of reproduction, the female gamete is significantly larger than the male gamete.

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but when we are given a large female gamete and a smaller male gamete..cant it be called as anisogamous also?

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yes.

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 then what is the difference?

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Isogamous
Anisogamous
oogamous
Gametes are similar in size
Gametes are dissimilar in size
Female gamete is larger in size and is immotile, whereas male gamete is small in size and is motile.
Eg: Chlamydomonas
Eg: Some species of Chlamydomonas
Eg: Volvox, Fucus
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