The difference between anaphase 1 and anaphase 2 is the separation of different types of chromosomes. In Anaphase 1 of mitosis, the homologous (same) chromosomes separate to either side of the cell, and the centromere is whole. In Anaphase 2, the sister chromatids separate, and the centromere is split, which causes the chromatids to separate.Continue Reading
In anaphase 1, the homologous chromosomes move to the opposite poles, and the sister chromatids remain attached. There are other changes: the kinetochore microtubules (spindles) shorten to pull the chromosomes towards the poles. This forms two haploid sets meaning that each set has 23 chromosomes or 46 total, the number typically found in humans. Each chromosome has two chromatids which move separately in anaphase 2.
In anaphase 2, the centromeres are cleaved down the middle allowing microtubules to attach to the kinetochores which pulls the sister chromatids apart. The centromeres are the center part of the sister chromatids that hold them together, often represented by a dot or a circle. When this is broken, the two separate. The sister chromatids are now called sister chromosomes as they move toward opposing poles and are no longer together. By this time, the cell is almost ready to completely separate into daughter cells, resulting in four overall daughter cells by the end of meiosis 2.Learn more about Molecular Biology & DNA
Fertilization of one egg by two sperm is possible, but the resulting zygote is almost never viable because such a zygote would have three sets of chromosomes instead of the normal two. This condition, called triploidy, is usually incompatible with life. Those rare triploid infants that do survive to term have severe and multiple birth defects and rarely live more than a few days.Full Answer >
Humans typically have 23 pairs of chromosomes, resulting in a total of 46 chromosomes. These chromosomes determine individual genetics traits as well as a person's gender.Full Answer >
The chromosomes in a cell's nucleus coil during prophase of mitosis in order to facilitate mobility. The chromosomes and the DNA become coiled and condensed during prophase.Full Answer >
Reference.com says that the function of chromosomes is to carry hereditary information. Chromosomes are located in the nucleus of a cell, and when a cell divides, so do the chromosomes.Full Answer >