What is a cell division?
cell division is the process that cells pass to divide. Cells can be divided for several reasons and, depending on the purpose, there are two types of cell division. Cell division associated with sexual reproduction is one type called meiosis . The second type, cell division associated with growth and replacing or repair of cells, is called mitosis . In both types of cell division, the nucleus is divided and the DNA replicates. However, chromosomes are not the only material that must be divided and transferred to daughter cells: there are also cytoplasm and cell membrane. cytokinesis is the process of dividing cytoplasm and cell membrane, and this process can follow immediately after mitosis or occur separately, depending on the organism involved. Together these two -shows form the mitotic phase of the cell cycle.
cell division phase are profse , metaphase , anaphase and telophase , and they occur in both mitosis and meiosis. Fifth phase calledA Prometaphase occurring between profse and metaphase is determined by some, but not all sources. interphase , which is not part of mitosis, is the preparatory phase during which the parent cell produces a copy of its genetic material so that each daughter cell can have a complete set. Mitosis is therefore a permanent and recurring process, alternating with intermediate.
On the other hand, meiosis reduces the number of chromosomes to half, so for example human eggs and sperm, called gametes, each of which has 23 chromosomes and can join the creation of a 46 zygota. It has two divisional phases, while mitosis has only one. Meiosis in Animals is called gametogenesis , specifically spermatogenesis , producing sperm, men and oogenesis , producing eggs or eggs, women. In a misunderstood, eggs and sperm are called haploid - have only one set of chromosomes and becomeIt eats diploid - with a pair of each type of chromosome - again when unified during fertilization.
Themeiosis specifically works on combining the genetic material of two individuals. If there is only one parent in the reproductive cycle - for example, in ferns that are reproduced through Spore - a daughter cell must have a full genetic material - all chromosomes - parent cells. Therefore, if the spore - sporogenesis - - is reproduced without meiosis.