Chromosome

condition that I am going to discuss is Down’s syndrome. Down’s syndrome is a genetic condition known as trisomy; this is where a person has an extra copy of one chromosome; people who have Down’s syndrome have 47 chromosomes. This extra chromosome is from group 21; people with Down’s syndrome have three copies of chromosome 21. The extra chromosome is caused by a mistake in the meiosis process; meiosis is the type of cell division by which gametes, the sperm cell…

the PD (parental ditype) and NPD (non-parental ditype) asci along with the segregation independently, should be equal. The second hypothesis is for linked genes and this is that both of the spore coloration are seen on the same pair of homologous chromosomes. This just makes them inherited together due to the linkage physically together. The rule states that Mendel’s law doesn’t correspond with this and it would not make sense if the genes were linked. If the genes were linked then the PD and T…

procedure that allows to replace a small amount of defective DNA in mother’s egg with a normal DNA from a second woman, therefore babies inherit genes from two mothers and one father. Consequently, the resulting baby has 20,000 genes on 23 pairs of chromosomes from its mother and father. The donor donates only DNA that is in mitochondria (less than 0.2% of total DNA). Two mitochondrial transfer techniques exist, both use in vitro fertilization (IVF) (Ian Sample, 2015). The first is maternal…

Williams’s syndrome is a disease that affects mostly the brain and has positives as well as negatives unfortunately the negatives outnumber the positives. Williams’s syndrome is caused by the deletion of the long arm of chromosome 7 and is not inherent. There are multiple medical problems caused by Williams’s syndrome, including developmental delays such as ADD and ADHA. A cardiovascular disease called supravalvular aortic stenosis also appears frequently in people with Williams’s syndrome and…

(process of cellular division) goes wrong? You can get a disease from Mitosis going wrong, some very bad ones too. A widely known disease caused by cellular division going wrong is Cancer and Tumors. (1)Disrupted passage through mitosis often leads to chromosome missegregation and the production of aneuploidy progeny. Aneuploidy has long been seen as a frequent characteristic of cancer cells. Also Aneuploidy has been seen as a frequent characteristic of tumorigenesis. Mitotic spindle assembly…

Klinefelter’s: Stories Needing to be Told Klinefelter’s syndrome affects 1 in every 600 males. Yet, surprisingly, it is often regarded as the “forgotten syndrome.” This is because after being discovered over 70 years ago by Dr. Harry Klinefelter, there are still many cases that go undiagnosed and many males that go untreated. This is due to a lack of public awareness about Klinefelter’s, a disease that everyone can be knowledgeable about when it is presented on an engaging platform such as TedEd…

characterized by the numerous benign tumors in many parts of the body. It can cause symptoms such as developmental delay, autism, tumor, and skin abnormalities. Tuberous Sclerosis is caused by a mutation on the TSC1 gene located on chromosome 9 or the TSC2 gene located on chromosome 16. These genes make a protein called tuberin, and scientist believe Tuberous Sclerosis is caused when those genes mutate and produce more tuberin which would then allow the tumors to grow. However, only one of the…

do not have a nucleus, so it can not go through mitosis. In a means to reproduce, they procreate using binary fission. During the process multiple fission, the replication of the archaeal DNA occurs and the two strands are pulled apart. Archaeal chromosomes replicate using DNA polymerases that mirror complements eukaryotic enzymes. Protein FtsZ, the protein that directs cell division, forms a contracting ring around the cell. The factors of the septum build up across the center of the cell,…

Gaucher Disease In 1882 a French physician, Philippe Charles Ernest Gaucher, first discovered Gaucher disease in a 32 year old woman; she had a swollen liver and spleen. Gaucher disease is a genetic disease meaning it is an abnormality in an individual’s DNA. Gaucher disease (GD) is described as an inherited disorder known to affect many of the body’s organs, such as the liver, spleen, bones, bone marrow and in severe cases the brain. It is also the most common lysosomal storage disease.…

Wolf Hirschhorn Syndrome (WHS) is a genetic disorder caused by a deletion (the removal or obliteration of written or printed matter) in the genetic material near the short (p) arm of chromosome 4 (also written as 4p). The Genetic Home Reference tells us that “ there are two copies of chromosome 4, one copy inherited from each parent” (Genet). However big or small the individual with WHS is, then the size of the deletion changes. The bigger the deletion the more severe the symptoms become…