Y chromosome

forty-seventh chromosome in their cells. Though this may seem like a minimal change beyond the norm, these are the instructions for how the body should develop and if anything is thrown off balance it could result in extreme anomalies. During a process called meiosis, a type of cell division, a sperm or egg may experience a critical error called nondisjunction where the sex chromosomes do not split correctly. When nondisjunction occurs, the sperm or egg will have an extra chromosome which will…

males between the ages of 5 - 24. Females are very rarely affected by DMD, and will not have the dramatic signs like the males do. Although if they are carriers of the mutated chromosome, they possibly will experience small symptoms of weakness in their muscles. However there were cases reported where a female’s second chromosome is damaged, in that case they develop DMD just as a male would. An estimate of 29% males between the age of 5-9 are forced into a wheelchair from Duchenne muscular…

(Trisomy X) Genetic Disorders are diseases inherited through genetics. These disorders are usually scarce in number but affect one in thousands or millions of people. Trisomy X or Triple X syndrome is a genetic disorder that causes there to be three X chromosomes in a woman’s body. Trisomy X was discovered by a scientist named Patricia Jacobs in Edinburgh, Scotland. It was later named “XXX Syndrome” by a British pathologist and geneticist named Bernard Lenox after Patricia Jacobs called the…

Disease Overview Ichthyosis is the primitive cause of dry, flaky, thick, scaly skin. There are several different kinds of Ichthyosis, the main one is Ichthyosis vulgaris as it accounts for over 90% of all Ichthyosis cases and then there is X-linked Ichthyosis, which is the least common type of Ichthyosis with there being only one in every 6,000 births in males (Panthagani). X-linked Ichthyosis was chosen as the area of interest, it is a recessive disease in which only males get the disease…

Does someone that you know have Triple x Syndrome or you want to know about it, well this research paper can tell you all about it. Triple x Syndrome can only affect women, and is created when an additional x chromosome is added to the other two x chromosomes. Triple x Syndrome was discovered by Patricia Jacobs in 1959 from one of her patients who was undergoing premature menopause. It can only affect women and they can be diagnosed with the disease at any age. The only noticeable effect it can…

long limbs, and abnormally small testes. Based on my findings, “Klinefleter syndrome is a chromosomal condition that affects male physical and cognitive development”(Genetics Home, 2015). This genetic disorder is a result of having 2 X and a Y-chromosomes mixed together. Individuals living with Klinefeter syndrome typically have small testes that do not produce as much testosterone as usual”(Genetic Home, 2015). In essence, the small testicle does not produce a large amount of sperm, or lead to…

XYY syndrome also known as Jacob’s Syndrome or XYY Karyotype, is rare genetic disease that affects males. XYY syndrome is a mistake that happens when “the two y chromosomes fail to separate when sperm cells are formed” (www.rarechromo.org) This is caused by having an extra “y” chromosome which gives the males forty-seven chromosomes instead of forty-six. XYY is not strictly inherited through a sex. Though it does come from the father, the father doesn’t have to have XYY syndrome in order for…

that will carry the recessive allele and the X chromosome is seventy five percent. For the fact, twenty five percent of the cell will carry homozygous recessive allele and X chromosome, the other fifty percentage will carry heterozygous recessive allele and X chromosome. (4.) A. Twenty Five Percent B. No. C. (X)R (X)r (X)R (X)R(X)R - Female homozygous dominant (X)R(X)r - Female heterozygous (Y)r (X)R(Y)r – Male heterozygous (X)r(Y)r – Male homozygous recessive Since the row…

Environmental-Dependent Sex Determination in Reptilians When we think of sex determination in organisms, we most often think of mitosis and the process of randomly receiving X and Y chromosomes from parent cells. This type of sex determination is known as genotypic sex determination (GSD), and it’s the most commonly found method of sex determination. However, this isn’t the only type of sex determination available to organisms. Some reptilians, for example, use environmental-dependent sex…

to get us ready to try to reproduce. Our bodies are made up of DNA. DNA is made up of chromosomes. We get 23 chromosomes from our dad and 23 chromosomes from our mom. We are made up of 46 chromosomes to make us whole. Chromosomes come in pairs, as partners. The only time they get together is during Meiosis. This is the process in which the genes between the two chromosomes in each pair producing chromosomes with new genetic combinations every time. Each…