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Q&A
Get true answers from experts in Genetics & DNA.
Prokaryotes define a specific type of organisms such as Bacteria where its genome is mostly a circular, single molecule of double stranded DNA. These organisms are capable of passing on their genes through asexual reproduction where a single cell results into two. As a result, bacteria is able to exchange DNA by three general processes: transformation, conjugation and transduction.
Published by Darcy Tang 60 months ago in Genetics & DNA | +0 votes | 0 comments
During DNA replication, there are chances that mutations arises when certain bases are inserted or deleted. However, mistakes always occur during DNA replication because its speed rate is approximately 3000 nucleotides per minute. Thus, the error rate is one per every 100,000 nucleotides which needs to be repaired using error-free mechanisms. These biological repair mechanisms include direct reversal, base-excision, nucleotide-excision, and mismatch in which will be further explained.
Published by Darcy Tang 61 months ago in Genetics & DNA | +0 votes | 0 comments
Model organisms that are used in genetics study. Biologists use model organisms to have deeper knowledge of the living organisms and the fundamental mechanisms of life. This article will give ideas on which living organism is preferably chosen to be scrutinized in the study of living species and how those model organisms can affect the future.
Published by Moon Park 61 months ago in Genetics & DNA | +0 votes | 0 comments
Readers will gain a simple, but to the point understanding of two sources of variation. The process of recombination is explained with a relatable, and easy to imagine example. Additionally, crossing over is also explained concisely for an easy and understandable read. Both processes happen within the S phase of the cell cycle, which is the phase where the cell’s DNA is being replicated.
Published by Liset Garcia 61 months ago in Genetics & DNA | +0 votes | 0 comments
There are a few differences in transcription of DNA between prokaryotes and eukaryotes. In this article, the focus will be primarily on how eukaryotes undergo from DNA to RNA with the main events that must occur, preinitiation, initiation, elongation and termination. Before mRNA is ready to be translated into a protein, there are three processes that it must undergo.
Published by Darcy Tang 61 months ago in Genetics & DNA | +0 votes | 0 comments
Meiosis is a sexual reproduction process in eukaryotes. This process produces gametes or spores. Gametes for animals and spores for plants. Under the process of meiosis, crossing over occurs and results in having four haploid cells. On the other hand, Mitosis only produces two diploid cells. Meiosis starts with only a diploid cell that consists of two chromosomes. This process has two stages, Meiosis I and Meiosis II.
Published by Wendy Ching 62 months ago in Genetics & DNA | +0 votes | 0 comments
GM foods are being grown in many countries. But different people have different things to say about their safety. Opinion is divided among scientists, consumers, environmentalists and politicians about whether or not GM food should be consumed. Why is there such a controversy? This article outlines the basic issue, and weighs the benefits of modified foods against the harmful effects.
Published by puneet sidhu 63 months ago in Genetics & DNA | +0 votes | 0 comments
This article describes an experimental type of treatment for HIV that is still in the testing stage. This article describes what the disease HIV is and how it affects a person's life. It then goes on to talk about the current treatment, possible future options based on scientific research and how this new treatment is different from current options.
Published by Lauren Griffiths 64 months ago in Genetics & DNA | +0 votes | 0 comments
Mutations occur every day within our bodies without us even knowing them. Outlined here are the three categories of mutations that can occur: Synonymous, Missense, and nonsense. Synonymous mutations cause no changes in protein expression while missense and nonsense can have detrimental consequences to the organisms gene expression and also to the fitness or the individual.
Published by Max Thorwald 64 months ago in Genetics & DNA | +0 votes | 0 comments
Researchers Wang et al conducted an analyis on "AGING AS A CONSEQUENCE OF MISREPAIR-- A NOVEL THEORY OF AGING" to identify what misrepair is and how it relates to aging. A theory proposed by the researchers proposed modifications to “damage (fault)-accumulation theory” to say that aging is due to the body’s misrepair of DNA, and thus, tissue.
Published by Saema A 64 months ago in Genetics & DNA | +0 votes | 0 comments
Inbreeding is a complex issue with complex genetic consequences. Inbreeding does increase prevalence of autosomal recessive disorders. But in the most common interbred marriages in the world, cousin marriages, the percentage increase in risk is not by very much, contrary to popular and historic belief. In this article, we define what inbreeding is, delve into a historical implication of it, and discuss current data.
Published by Saema A 64 months ago in Genetics & DNA | +0 votes | 0 comments
Humans undergo DNA damage constantly, but repair mechanisms have evolved to deal with the various types of mutation that occurs to DNA. Repair mechanisms are not one-hundred percent effective because cancer and mutations causing physical deformities are still present throughout the world. This article will discuss and outline several different types of DNA repair mechanisms that have allowed organisms to survive.
Published by Jaime Felix 64 months ago in Genetics & DNA | +0 votes | 0 comments
A brief overview of genetic mutation and their categories: specifically, single point mutations, nucleotide base additions and deletions, and base substitution, as well as induced vs. spontaneous mutation. When they occur within protein encoding genes, they can have deleterious effects, and cause several human diseases, such as sickle cell anemia.
Published by Wai Szeto 64 months ago in Genetics & DNA | +0 votes | 0 comments
Transposons are only one of many different movable genetic elements found within our genome. Movable genetic elements allow for genetic material to be shared and transferred between cells and within cells giving rise to mutations and variation in a population. Transposons can be classified into two different classes, “copy and paste” and “cut and paste”.
Published by Juliane Liberto 64 months ago in Genetics & DNA | +0 votes | 0 comments
There are two types of mutations, spontaneous and induced. The first type, as is specified by its name, is a naturally occurring DNA mutation that can arise in all cells. The second set of mutations arises from the action of certain agents known as mutagens. These mutagens increase the rate at which mutations occur. However, both spontaneous and induced mutations are random, which is significant because it allows for genetic diversity within a species over time.
Published by Jennifer Liberto 64 months ago in Genetics & DNA | +0 votes | 0 comments
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