X chromosome

has any influence on chromosome instability and if it does, how to correct it. This is important because chromosome instability is proposed to be a major contributor to the acceleration of cancer cell evolution1, and as a previously overlooked source, cohesion fatigue can induce chromosome instability. The authors focused on the cohesion complex in this study since in a previous study they identified that a certain protein, Ska3, was important in the maintaining of chromosome cohesion2. This…

the “reduction division” because the homologous chromosomes, chromosomes that are identical, are separated into two different cells. These two new cells are referred to as haploid because they only contain one copy of each chromosome (1n). Meiosis I differs most from mitosis because more chromosomes are involved during this process. During Prophase I, everything that normally happens in Prophase still occurs, but in Meiosis, the homologous chromosomes must be paired up and then crossed over into…

In mitosis, a cell produces two clones of itself, each with the same number of chromosomes. In meiosis, a cell will produce four cells called gametes through the process of spermatogenesis and oogenesis. Gametes are most commonly known as sperm cells in males and egg cell in females. Unlike mitosis, the gametes that meiosis produces are not clones of the original cell as each gamete has exactly had as many chromosomes of the original cell and are all different from one another (siblings).…

Metamorphosis is a biological process by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the animal's body structure through cell growth and differentiation. “Some insects, fishes, amphibians, mollusks, crustaceans, cnidarians, echinoderms and tunicates undergo metamorphosis, which is usually accompanied by a change of habitat or behavior”. (http://en.wikipedia.org/wiki). But this change has been incorporated to human’s life…

It usually does not cause problems or require treatment. You can’t see the defect, but those affected by it often have a small dimple, hairy patch, or birthmark on their back. Many people with this form don’t even know they have it until they have an x-ray…

3. Results 3.1. Bumblebees We recorded a total of 98 bumblebee individuals (Bombus sp.) comprising 13 species (Appendix A, Table A.1). Sixty-four individuals belonging to 12 species were identified in managed meadows, and 34 individuals belonging to 8 species in abandoned meadows. Three of the total species were cuckoo bumblebees (Bombus [Psithyrus] sp). Five species were classified as long-tongued and 8 species as short-tongued. Total species richness and number of long-tongued species were…

Xenotransplantation is the process of transplanting or grafting organs and tissue between different species. As you’re transplanting a foreign organ not from the same species as you, this has many social and biological implications. Including the fact that there’s could be new viruses and pathogens passed over between species with the potential to cause a mass epidemic and kill of many members of a species. Also this procedure although been around for a long time it hasn’t had a very high…

Gregor Mendel was the first person to make connections between parents and children by using math symbols. He made the set of laws which are now known as the three laws of inheritance. This set of laws consists of the Law of Dominance, the Law of Segregation, and the Law of Independent Assortment. To begin, the first law of inheritance is the Law of Dominance. This law states that genes come in pairs and are inherited in different units called alleles. In a situation with one dominant allele and…

the parent cell. Mitosis is the division of the genetic material in the nucleus which is immediately followed by cytokinesis. On the other hand, meiosis occurs in sexually reproducing organisms and this type of cell division reduces the sets of chromosomes from two to one in gametes. Both mitosis and meiosis differ, however, both processes result in daughter cells forming. In the end of mitosis, two daughter cells appear shortly after and have identical DNA like the parent cell. However, in…

Genetic Diseases And Disorders Research Paper Down syndrome is a disorder of a person's chromosomes that cause mild to severe physical and mental disabilities. People are affected from birth and until death. Noticeable physical problems include a small skull , a narrowed or flat nose bridge, poor muscle tone, and folds beneath the eyes. It occurs in about one in every 700 births. Nearly 1600 kids are born with down syndrome in the united states. Most people that have down syndrome have…