What is chromatid?Cell division is important for the life of a multicellular organism. In the end, we were all created from a single cell that shared over and over again. During this process, the nucleus also undergoes certain transformations in eukaryotic cells, called mitosis and meiosis. Chromatids are copies of chromosomes that were created before nuclear fission.
When it comes to evolution, geneticdiversity deserves special attention. In meiosis (the process of nuclear fission), a cell is formed from the haploid gamete spermatozoon and the egg cell. Genetic diversity is increasing in two main directions. First, homologous chromosomes are randomly divided into daughter cells, thus many possible combinations of maternal and paternal chromosomes occur. Homologous recombination (sequence exchange) is the second way to increase genetic diversity.
During cell division, these duplicatesconnect with each other in an area called the centromere. After the combined sister chromatids are separated from each other in the anaphase of mitosis, each of them receives a new name - daughter chromosomes. What is chromatid in biology? Scientifically speaking, this is one of the 2 nucleoprotein strands that are formed when the chromosome doubles, which occurs during cell division. They are half of the two identical copies of the replicated chromosomes.
Chromatin is DNA that is wound aroundproteins, thus forming spiral fibers. It is from these that the chromatids are formed. Before replication, the chromosome appears as a single-chain chromatid. After replication, it acquires a familiar X-shape. Each human cell contains 23 chromosome pairs, in total this number is 46 chromosomes.
It is customary to call a chromatid either one of two copiesDNA molecules that together make up the chromosome, which had previously been replicated and connected in an area called centromere. This name is used as long as these centromeres remain in direct contact. When the chromosomes are divided during the anaphase of mitosis or meiosis, the filiform chromatids become daughter chromosomes. Simply put, these are halves of replicated chromosomes.
