Meiosis

Describe the chemical structure and function of DNA DNA is a fundamental molecule responsible for the growth and maintenance of the human body. Since the discovery of DNA and its double helix structure though the Watson-Crick Model, there has been a significant increase in the understanding of human disease and development of effective treatment. DNA’s specific chemical structure allows it to carry out its function which therefore maintains our survival. Deoxyribonucleic acid is a…

removed from a woman, and joined with the sperm cell from a man. This process all happens in a test tube, for the intent of controlling those who suffer from problems with fertility (Pbs.org, n.d.). The cells then join together in a process called meiosis, where they then divide to form an embryo. IVF is most commonly used for those who would otherwise be unable to have children, including blocked tubes, same sex couples, or infertility, and allows a couple to still undergo the natural child…

Evolution is how modern living organisms are related to ancient ones. Organisms have diversified and modified through ages and old one became extinct. According to Charles Darwin, all species have common ancestors. This means that, for instance, whales and dogs are related to each other by an old ancestor. Indeed, many organisms have common traits and characteristics, but this still doesn't mean that they are related. Darwin's theory, which all organisms descend from one ancestor, is the result…

Kanesha Brown Anatomy and Physiology 251L The University of Southern Mississippi Nervous System What is paraplegia? Paraplegia is the paralysis than can affect all or part of the bottom portion of your body, meaning the legs and pelvic organs. Paraplegia is a spinal cord injury that results from damage to the vertebrae, ligaments and disks (Mayo Clinic, 2016) For an injury to cause paraplegia one would have to suffer a traumatic injury to the spinal cord that may cause your spine to fracture,…

Metaphase I (MI) (Assembly of meiotic apparatus) During Metaphase I, Chromosomes move together along the metaphase plate. DNA replication, repair spindle function, and chromosome segregation are controlled by regulatory mechanisms of spindle assembly checkpoints (Elledge, 1996). The cellular spindle apparatus includes the spindle microtubules, associated proteins, and any centrosomes or asters present at the spindle poles. The dynamic lengthening and shortening of spindle microtubules (Mitchison…

specific neurons resulting in neuronal death. Caudate nucleus and putamen are commonly affected. HD also exhibits anticipation i.e. the disease occurs early and is more severe for future generations. The length of CAG repeats increase with subsequent meiosis, hence, an increased CAG length is inherited by the progeny, resulting in more severe disease. HD is diagnosed on clinical grounds with positive genetically proven family history. A genetic testing is advised if a family history is absent or…

Based on research 95% and 99% of individuals diagnosed with Klinefelter syndrome are infertile because they do not produce enough sperm to fertilize an egg naturally Paduch, D.A., Fine, R.G., Bolyakov, A., & Kiper, J. (2008) For infertility, Intracytoplasmic sperm injections have been a successful method for individuals diagnosed with Klinefelter syndrome that are trying to conceive a child. For this procedure, a surgeon removes sperm from the testes injected into a needle and places one sperm…

I have found through my AS Psychology lessons and from personal experience with family members, that mental illness is a topic that interests me immensely. In my lessons I learned how mental illness is treated and theories about how it is caused, such as the biological approach which suggests that mental illness is caused by changes to the brain or neurotransmitters. For example, there is evidence to suggest that depression is caused by the lack of serotonin in the body. My interest in mental…

Hibiscus rosa-sinensis is the scientific name for Hibiscus. Other places around the word may call it Chinese hibiscus, China-rosa, and Hawaiian hibiscus (USDA, ARS, National Genetic Resources Program). Hibiscus is native to East Asia, but may be seen in numerous places. It is widely cultivate around the world. Hibiscus rosa-sinensis came from the scientific classification: Kingdom is Plantae; unranked are Angiosperms, Eudicots, and Rosids; Order is Malvales; Family is Malvaceae; Genus is…

There have not been many things which have taken up most of my mind in the past few years other than Genetics. Ever since I attended Dr. Lander’s lecture MIT 7.00x Introduction to Biology, I have been hooked onto the subject. He talked primarily about genetics as he is a geneticist, but attributed to other aspects of biology as well. He taught a college level course, and when I took it, I was still in high school, but regardless, I understood most of the genetic aspect of it. It feels that it is…