Biology Notes About Dna's Roll In A Cell And How It Is Fitted In. Also Includes Plenty Imformation On Chromosomes.

749 words - 3 pages

DNA directs a cell's activities and determines a cell's characteristic. This vast amount of vital information encoded in DNA is organized into genes. A gene is a segment of DNA that transmits information from parent to offspring. When a cell prepares to divide, the DNA molecule coils and twists into a dense structure called a chromosome. A chromosome is a rod-shaped structure that forms when a single DNA molecule and its associated proteins coil tightly before cell division.Chromosomes become visible through a microscope only after they have condensed prior to cell division. By this time, each chromosome has formed a copy of itself. The two copies of each are called chromatids. The two chromatids are attached by a protein disk at a point called a centromere.Human cells have 23 different chromosomes. Your body cells (also called somatic cells) contain two copies of each chromosome, for a total of 46 chromosomes. The two copies of each chromosome are called homologous chromosomes, or homologues. Homologous chromosomes are similar in shape and size and have similar genetic information. You received one homologue of each chromosome from your mother and the other homologue from your father. When a cell contains two homologues of each chromosome, it is termed diploid.Not all cells are diploid. In the life cycle of animals, including humans, gametes - egg cells and sperm cells - are haploid. A haploid cell contains only one homologue of each chromosome. The fusion of two haploid gametes forms a diploid zygote. A zygote is a fertilized egg cell, the first cell of a new individual. Being haploid ensures that when an egg and a sperm fuse, the resulting zygote will contain the characteristic diploid number of chromosomes for that organism.In most cases, humans who are missing even one chromosome do not survive embryonic development. The condition in which a diploid cell is missing a chromosome is called monosomy. The condition in which a diploid cell has an extra chromosome is called trisomy.Deviation in chromosome number can be detected by analyzing a karyotype, the collection of chromosomes found in an individual's cells.An example of trisomy is Down syndrome. The features that characterize Down syndrome include a short stature, a round face...

Find Another Essay On Biology notes about DNA's roll in a cell and how it is fitted in. Also includes plenty imformation on Chromosomes.

This is an essay about the NCAAP and its fight against segregation and descrimination of colored people in publich schools. It also includes how the NCAAP goes about reaching its goals

974 words - 4 pages do so today. In the past, the NAACP sought to get colored people into schools that would provide for them the same education provided to a white student. (Tushnet 29) This was to a large degree successful and today the shift has focused. The NAACP now pushes a Back To School/Stay In School campaign. This is designed to arouse community interest in education and decrease the dropout rate. It is carried out by providing mentoring, tutoring

What is stem cell research and how it has come about in recent years

889 words - 4 pages , including those of hair and teeth. He traced the origins of the tumour to a stem cell. Yet the field of stem cells only took off after Canadian scientists Ernest A. McCulloch and James E. Till in the 1960s examined it.Now in modern days Research on stem cells is advancing now more than ever with scientists extending their fields of scientific enquiry to gain more knowledge about how and to what extent stem cells can be used. This promising area

This essay is about William Carlos Williams. It is about his life and also includes analysis of a few of his poems

511 words - 2 pages says what he is thinking and lets the reader figure the rest out. In the first stanza, he could have made a long list of what depends on the red wheelbarrow, like a farmer or a worker, but he doesn't, which makes the reader have to think. In the third stanza he could have blabbered on about why the wheelbarrow was exactly glazed with rainwater, using metaphors and similes, but he decided he only wanted what was truly necessary. He could have also

This report is about ancient Egyptian pyramids and how they were built. also includes information on why they were built. Title: Egyptian Pyramids

814 words - 3 pages the ancient Egyptians believed in the afterlife was due to the following legend: "Osiris, a great and benevolent king on earth, was murdered by his jealous brother, Set, who tore the body into sixteen pieces and scattered the pieces over Egypt. Osiris's wife, Isis, was grief-stricken. She managed with great difficulty to collect the pieces and bind them back together with strips of linen cloth. Anubis, god of the Netherworld, helped her with his

This essay is about the history of Rock and Roll and how it changed society

744 words - 3 pages . The Beatles created a frenzy in the U.S. as they became a model for rock and roll. It was during this time period that the British seemed to claim rock music. However, from the music of the Beatles emerged a new type of rock music, which became known as folk rock. This type of music, also popularized by singers like Bob Dylan, put an emphasis on lyrics. The Beatles demonstrated this style as their music became more sophisticated, and their lyrics

This essay is about the campaign for presidency. It includes the use of frontloading in presidential primaries and its effects and how the media's bias effects the campaign

1675 words - 7 pages what they should focus on. This is because winning these primaries would bring in more name recognition among the voting public.Front-loading also causes a "successful candidate to need at least $40 million in the bank well before the first vote is cast." There are many ways to receive contributions, because there is a $1000 limit on each individual contribution, corporations, political action committees, and special interest groups are the way to

The Contrast of French and Spanish Missionaries. This essay is a detailed research paper based on the topic above. It also includes a MLA Format Work Cited Page

1087 words - 4 pages pursue their mission. An example of this success is well illustrated in the journal written by Carlo Krieger. He quotes that "... he noticed Micmac children taking notes on charcoals on birch bark in order to better memorize a prayer which he had taught them."Even though there were differences in the methods which the Spaniards and French used for evangelization, their goals were the same. Through these missions they believed to spread the

This Is A Research Essay About The Mafia And The People And Events In It. It Mentions Many Of The Biggest Names In The History Of The Mafia. It Also Enlightens Us To The Early Beginning Of The Mafia

2007 words - 9 pages more to come. In the eleventh century Sicily was taken over by the Normans, and again in the fifteenth century by the Spaniards. Throughout these invasions the mafia has defended Sicily. As a result of this, the mafia has become a patriotic symbol for Sicilians. The mafia is broken down into families. It may not necessarily be a relation by blood but it's like a gang inside of a gang. Throughout the mafia's history there have been some families

This is a essay about unicorns. this includes 3 in text citations and is great to use if you get to pick the topic you are writing on

815 words - 3 pages Imagine yourself sitting in a field having a picnic, then, all of a sudden a big white horse comes up to you, but, then you notice the big horn coming out of its head and you know it is a Unicorn. Many people believe in suck a thing as a Unicorn, in my report I am going to tell you about these people, and the people that don't believe too. I, personally don't believe in such a thing as a Unicorn but, I don't discredit those people that

Essay: I had to write an essay about a conflict in my life, and how I handled it. If it was overcome or not. I also had to present a clear thesis in my essay

529 words - 2 pages working with my father at his restaurant until two in the morning, and I was exhausted. He always had some type of task he was working on, and I would always help. It bothered me that other boys could come home and do their school work, then play. I was also not allowed to have female classmates as friends. I could not even call them for assignments. This is something I didn't understand at all. I could not talk to my father about these issues

Cults. This essay tell about cults in north america, it tell us how they are formed and what they do. It also tell us about social interaction

2054 words - 8 pages recruiters, to obtain new members, is through chatlines on the internet. A recorded conversation between a memberof the Divine Light Mission, Fire-Shade, and an 18-year old boy, Jay18, was obtained off of the site, IRC Teen Chat.Jay18: I am a really great poet, but all of the kids in myclass are pretty warped about it. I basically hide it from thembecause I don't need that hassle.Fire-Shade: My family has a great respect for the artist insideus all. I

Similar Essays

Biology 10 Notes On Genes, Chromosomes, Mendel's Laws, And Mitosis Vs. Meiosis

720 words - 3 pages Gene: segment of DNA that controls design or structure of a trait/characteristic of the cell or organism. In the most multicellular organisms 2 copies of the segment of DNA, termed Alleles, interact to give the particular form of the trait as seen. Autosomal Gene: Gene located on an autosomal chromosome which is any of the 22 human chromosomes (or 3 Drosophila chromosomes) other than the X or Y. Autosomal genes are never sex

Biology Exam Notes: Units On Reproduction In Plants And Animals (Sexual & Assexual), Mitosis & Meiosis, Growth And Cell Division

2411 words - 10 pages granules under the egg membrane to discharge their contents into the space around the egg. This brings about a change in the membranes structure and prevents additional sperm from fusing with the egg.·Inside the egg the nucleus of the sperm, carrying half the number of chromosomes, fuses with the nucleus of the egg, also carrrying the haploid number of chromosomes, so that the fertilised egg has the diploid number.·It is now a zygote

Cell Biology Notes Alzheimers Disease Essay

793 words - 3 pages in a progressive reduction of one's memory and other reasoning functions. The hallmark of AD is the destruction of nerve cells and neural connections in the cerebral cortex of the brain and by a substantial loss of brain mass. Familial Alzheimer's disease results from an inherited genetic mutation. Alois Alzheimer discovered two abnormalities in the brain: neuritic plaques and neurofibrillary tangles. However, it is not known whether the plaques

Misogyny. This Essay Is About Misogyny In Shakespeare's Titus Andronicus. It Cites Quotes And Passages From The Play. It Also Includes A Bibliography

1287 words - 5 pages punished as if her crimes were of the worst nature, when in fact her only crime was being a woman. Her genetic makeup ultimately decided her most unfortunate destiny. The reason that Shakespeare mocked women so enthusiastically is because women were inferior in his own lifestyle, and that was the mindset of the viewers of his plays. In any case, his play Titus Andronicus holds strong views about retribution of women and especially those in