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what is sexaul reproduction and asexual reproduction??? |
Asexual reproduction needs only one parent, unlike sexual reproduction, which needs two parents. Since there is only one parent, there is no fusion of gametes and no mixing of genetic information. As a result, the offspring are genetically identical to the parent and to each other. They are clones. Sexual reproduction is a way of reproduction of some animals and plants. Some protists and fungi also reproduce this way. Organisms that reproduce sexually have two different sexes: male and female. Offspring is made by a cell from the male and a cell of the female. Different steps are involved in the process. The cells of an animal or higher plant have two sets of chromosomes: they are diploid. When gametes (sex cells) are produced, they have only one set of chromosomes: they are haploid. They have undergone a process of cell division called meiosis. During meiosis, crossing over occurs. This makes it possible to get recombination. This has various consequences.( It means, for example, that all the children of two parents are not identical, except in the rare case where they developed from the same fertilized egg) The second step is called fertilization. In it, the two cells merge into one. This restores the diploid state. |