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sheet#12,Dr Faleh,Raghad Alawnah
sheet#12,Dr Faleh,Raghad Alawnah

Chapter 6 – Microbial Growth
Chapter 6 – Microbial Growth

... 1. May cause modification of a base to cause mispairing. (Fig. 8.19) 2. May cause small insertions or deletions. E.g. soot or other compounds can sit in between bases and force a gap. iii. Ionizing radiation – rays will ionize normal compounds and make them react inappropriately with other molecules ...
Biology  6 Test 2 Study Guide
Biology 6 Test 2 Study Guide

... 1. May cause modification of a base to cause mispairing. (Fig. 8.19) 2. May cause small insertions or deletions. E.g. soot or other compounds can sit in between bases and force a gap. iii. Ionizing radiation – rays will ionize normal compounds and make them react inappropriately with other molecules ...
Meiosis PPT
Meiosis PPT

... Meiosis I (four phases) • Cell division that reduces the chromosome number by one-half. • four phases: a. prophase I b. metaphase I c. anaphase I d. telophase I ...
proportion of  mosaics among  mutations decreased
proportion of mosaics among mutations decreased

... proporx-rays ...
Sample pages 1 PDF
Sample pages 1 PDF

... “Chromosomes have attracted many microscopists not only because these sausage-like bodies represent vehicles of genetic material (and hence, are biologically important) but also because they are hypnotically beautiful objects” (Hsu 1979). The first cytologist who described chromosome behavior during ...
Evolution review!
Evolution review!

... A. Radiation changing the DNA sequence in skin cells B. A gamete with an extra chromosome forming C. Tobacco smoke altering the genes in lung cells D. Exposure to chemicals that alter nerve cell function ...
Mutagenesis (mutations) and Teratogenesis
Mutagenesis (mutations) and Teratogenesis

... From Placenta,Vagina(85%)- Defect in CNS,liver, pancreas,ren,suprarenal glands, infection on skin, Eyes or mouth – no treatment=40-50% death ...
BRCA gene testing: A general overview
BRCA gene testing: A general overview

PDF - Sci Forschen
PDF - Sci Forschen

... embryonic life is also observed in some solid tumors, including colorectal cancer [6,14-16]. Some subjects with RBC blood group O phenotype may present an incompatible A antigen expressed in their malignant cells [17]. There are few studies exploring the mechanism of synthesis of an incompatible A a ...
DNA Questions #4 Questions on the PCR Process:
DNA Questions #4 Questions on the PCR Process:

... person and sample are the same. If the sample is from a female, it will show only one peak for AMELX at 109 bp. If the sample is from a male, there will be two peaks. One will be for AMELX at 109 bp and one for AMELY at 112 bp. The two peaks will be very close to each other at the beginning of the e ...
Statements about Cancer
Statements about Cancer

... them how to grow and divide. Normal cells often develop mutations in their DNA, but most cells have the ability to repair most of these mutations. If cells can't make the repairs, the cells often die. However, certain mutations aren't repaired, causing the cells to grow and become cancerous. Mutatio ...
Essential Cell Biology chapter 5 excerpt
Essential Cell Biology chapter 5 excerpt

... genetic instructions required to make and maintain a living organism. This hereditary information is passed on from a cell to its daughter cells at cell division, and from generation to generation in multicellular organisms through the reproductive cells. These instructions are stored within every l ...
Date Monday 5/5 Tuesday 5/6 Wednesday 5/7 Thursday 5/8 Friday
Date Monday 5/5 Tuesday 5/6 Wednesday 5/7 Thursday 5/8 Friday

... About 1 in 150 babies is born with a chromosomal abnormality. These abnormalities are caused by errors in the number or structure of chromosomes. There are many different chromosomal abnormalities. Many children with a chromosomal abnormality have mental and/or physical birth defects. Understanding ...
Chromosomal Alterations - ReadingSample - Beck-Shop
Chromosomal Alterations - ReadingSample - Beck-Shop

... “Chromosomes have attracted many microscopists not only because these sausage-like bodies represent vehicles of genetic material (and hence, are biologically important) but also because they are hypnotically beautiful objects” (Hsu 1979). The first cytologist who described chromosome behavior during ...
1BIOLOGY 220W - Lecture Notes Packet
1BIOLOGY 220W - Lecture Notes Packet

... are runs of simple repeats, like CACACACACACACA, and it happens that such runs have a high error rate when DNA polymerase copies them. This results in a high mutation rate, and the end result is that populations tend to be highly variable for these runs. Microsatellites are of enormous utility in hu ...
In-class Interactive Case Discussion PowerPoint
In-class Interactive Case Discussion PowerPoint

... naturallyoccurring DNA can’t be patented while synthetic DNA can ...
PCR
PCR

Are There Significant Genetic Risks for Lu...
Are There Significant Genetic Risks for Lu...

... So these are my daughters: at left this is Betty, and I know she has a little more hair than her smiling sister Dina there, but I’ll tell you they are actually identical twins. They have the same DNA. When my wife and I made them, I donated a sperm, she donated an egg, those came together. We got th ...
Section 13-1 Ghanging the Living World
Section 13-1 Ghanging the Living World

... 7. Circle the letter of the process by which DNA fragments are separated and analyzed. a. gel electrophoresis c. transformation b. extraction d. restriction 8. In the diagram beloq label the positive and negative ends of the gel and identify the location of longer and shorter fragments. ...
Document
Document

... – Asexual organisms don't have back-up copies of genes, sexual organisms have 2 sets of chromosomes and one can act as a back-up if the other is damaged. – Sexual mechanisms, especially recombination, are used to repair damaged DNA - the undamaged chromosome acts as a template and eventually both ...
Word - State of New Jersey
Word - State of New Jersey

... explanations about the relationship between the role of DNA and chromosomes in coding instructions for characteristic traits passed from parents to offspring. Students should also research and investigate types of DNA, including DNA that codes for proteins, hemoglobin, actin, myosin), DNA that is in ...
Title CHROMOSOMAL ASSIGNMENT OF
Title CHROMOSOMAL ASSIGNMENT OF

... chromosome fraction. The arrow indicates the position of the DNA fragment hybridizing to the probe. Positions of marker DNAs using Hindlll-digested phage DNA are shown on the l e f t . The gastrin gene is in fraction F that contains chromosomes 16, 17, 18. (C) Flow histogram of chromosomes from a hu ...
Unit 6: DNA and Inheritance
Unit 6: DNA and Inheritance

... All cells in an organism have the same genetic content, but the genes used (expressed) by the cell may be regulated in different ways. ...
Chapter 11 Powerpoint
Chapter 11 Powerpoint

... Heritable Changes in Chromosome Number • Chromosome number of a parental cell can change permanently • Often caused by nondisjunction – Failure of one or more pairs of duplicated chromosomes to separate during meiosis or mitosis – Nondisjunction affect the chromosome number at fertilization ...
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Mutagen



In genetics, a mutagen is a physical or chemical agent that changes the genetic material, usually DNA, of an organism and thus increases the frequency of mutations above the natural background level. As many mutations can cause cancer, mutagens are therefore also likely to be carcinogens. Not all mutations are caused by mutagens: so-called ""spontaneous mutations"" occur due to spontaneous hydrolysis, errors in DNA replication, repair and recombination.
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