Meiosis is a type of cell division that occurs in sexually reproductive organisms that leads to the production of reproductive cells called gametes. The process of meiosis begins with a diploid (2n) cell, which has a full amount of chromosomes. For example, in humans, the diploid number is 46. Meiosis gives the end product of four haploid (n) gametes, which have half of the amount of DNA that their parent cells have. In humans, this haploid number is 23. The process of meiosis has many steps through which this transformation occurs, but these steps help to increase the genetic diversity of all sexually reproductive organisms.
Continuing the explanation of meiosis through a human cell, this cell will start off with 46 chromosomes prior to meiosis. This constitutes 23 homologues, or homologous chromosomes. In each …show more content…
SCID is caused by a defected in several possible genes, which leads to virtually no immune system. This means that those who suffer from SCID are highly susceptible to any illness. This genetic order is called “combined” because it is characterized by defects in T and B cell responses. Each of these cells is made to execute a specific immune response, and, without them, the immune system is nonexistent. The most common variation of SCID is called XSCID because the mutated gene is located on the X chromosome. The phenotypic characteristics of SCID are high susceptibility to infections and diarrhea. This disorder is extremely rare, but will usually lead to death before the age of two years old when untreated. After decades of research and experiments, the most effective treatment for SCID has been a bone marrow transplant. This process takes bone marrow from a healthy person and transplants the healthy stem cells into the child with the disorder. If done early enough, there is a good chance that they will survive and build an immune
Continuing the explanation of meiosis through a human cell, this cell will start off with 46 chromosomes prior to meiosis. This constitutes 23 homologues, or homologous chromosomes. In each …show more content…
SCID is caused by a defected in several possible genes, which leads to virtually no immune system. This means that those who suffer from SCID are highly susceptible to any illness. This genetic order is called “combined” because it is characterized by defects in T and B cell responses. Each of these cells is made to execute a specific immune response, and, without them, the immune system is nonexistent. The most common variation of SCID is called XSCID because the mutated gene is located on the X chromosome. The phenotypic characteristics of SCID are high susceptibility to infections and diarrhea. This disorder is extremely rare, but will usually lead to death before the age of two years old when untreated. After decades of research and experiments, the most effective treatment for SCID has been a bone marrow transplant. This process takes bone marrow from a healthy person and transplants the healthy stem cells into the child with the disorder. If done early enough, there is a good chance that they will survive and build an immune