Two basic patterns of reproduction have been observed among animals and these are asexual and sexual. In asexual reproduction an individual can give rise to daughter individuals by mitotic divisions of a part of its own body; no gametes are required. In sexual reproduction, genetically distinct two special sex cell called gametes, fuse to form one cell structure the zygote [...]
The following points highlight the three events that take place during the sexual reproduction. The events are: 1. Pre-Fertilization Events 2. Fertilisation 3. Post-Fertilisation Events. 1. Pre-Fertilization Events: All the events of sexual reproduction that take place before the fusion of gametes are included in this category. Two main pre-fertilisation events are gametogenesis (formation of gametes) and gamete transfer. (i) [...]
In this article we will discuss about the asexual and sexual modes of reproduction in plants and animals. Sexual Reproduction in Plants and Animals: The mode of reproduction which involves the formation of male and female gametes either by the same individuals or by different individuals of opposite sex is known as sexual reproduction. These gametes fuse to form a [...]