what is the meaning of isogamous , heterogamous , oogamous ?? in deeply
Answers
Answer:
ISOGAMY
The fusion of morphologically similar but physiologically dissimilar two gametes is called isogamy. There is no differentiation between female gametes and male gametes in isogamy. They are referred to as positive (+) and negative (-) mating types. Both gametes are absolutely identical in size, shape, and appearance. They can be rounded or pear-shaped cells. Gametes have flagella to move towards their destinations. Once they fuse, a zygote is produced, resulting in a new organism. This type of syngamy is shown by unicellular organisms like protozoans, lower plants like algae and some fungi.
ANISOGAMY OR HETEROGAMY
If syngamy occurs between two dissimilar male and female gametes, it is known as anisogamy or heterogamy. In anisogamy, male and female gametes can be differentiated as sperms and eggs. Both gametes are motile in some species while only the male gamete is motile in some organisms. Female gamete is larger in size than the male gamete. In certain organisms, the female gamete does not have flagella to move. Hence, male gamete moves towards the female gamete for syngamy. Anisogamy is shown by lower plants such as certain green algae and red algae.
OOGAMY
Oogamy is a type of anisogamous sexual process. It can be defined as the fusion of large, immotile egg cell with small and motile sperm cell to produce a zygote. Male and female gametes are largely different in size, shape, appearance and motility. Male gamete bears a flagellum; hence, it is highly mobile. The egg cell is comprised of a lot of nutrients for future use during the development of the offspring.
Oogamy is a type of anisogamous sexual process. It can be defined as the fusion of large, immotile egg cell with small and motile sperm cell to produce a zygote. Male and female gametes are largely different in size, shape, appearance and motility. Male gamete bears a flagellum; hence, it is highly mobile. The egg cell is comprised of a lot of nutrients for future use during the development of the offspring.Oogamy is shown by all higher plants and animals.
isogamous :
Fusion between two gametes of similar size is called isogamous fusion.
oogamous:
Fusion between one large, non-motile female gamete and a smaller, motile male gamete is called oogamous fusion.
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