The germ cells of animals are formed as a result of a special type of division, in which the number of chromosomes in the newly formed cells is two times less than in the original mother cell. Thus, haploid cells are formed from the diploid cell. This is necessary in order to maintain a constant set of chromosomes of organisms during sexual reproduction. This type of cell division is called meiosis. Meiosis (from the Greek. Meiosis – reduction) – reduction division, in which the chromosome set of cells is halved. The same stages are characteristic for meiosis as for mitosis, but the process consists of two consecutive divisions – I division and II division of meiosis. As a result, not two, but four cells with a haploid set of chromosomes are formed.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.