Define isogamy / heterogamy/ anisogamy/ oogamy.

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Solution

Anisogamy or heterogamy is the fusion of gametes that are dissimilar in sizes.
Isogamy is the fusion of gametes of similar sizes.
Oogamy is the fusion of a large immotile female gamete with a motile male gamete.

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Q. Which of the following algae exhibit all three forms of syngamy - isogamy, anisogamy and oogamy?

Fusion of two motile gametes which are dissimilar in size is termed as

(a) Oogamy (b) isogamy (c) Anisogamy (d) zoogamy

Match the following and choose the correct option -

$\begin{matrix} C o l o u m n I & C o l o u m n I I a . I s o g a m y & 1. Male and female gametes are different b . A n i s o g a m y & 2. Female gamete is non-motile c . O o g a m y & 3. Gametes are identical \end{matrix}$

Members of phycomycetes

(i) exhibit asexual reproductions by zoopores and aplanospores

(ii) exhibit sexual reproduction by isogamy, anisogamy and oogamy

(iii) have aseptate and coenocytic mycelium

(iv) found in aquatic habitats on decaying wood, moist and damp places or as obligate parasites

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Define isogamy / heterogamy/ anisogamy/ oogamy.

Anisogamy or heterogamy is the fusion of gametes that are dissimilar in sizes. Isogamy is the fusion of gametes of similar sizes.Oogamy is the fusion of a large immotile female gamete with a motile male gamete.

Anisogamy or heterogamy is the fusion of gametes that are dissimilar in sizes.
Isogamy is the fusion of gametes of similar sizes.
Oogamy is the fusion of a large immotile female gamete with a motile male gamete.