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three mitosis and meiosis
three mitosis and meiosis

... Mitotic cell division produces new cells genetically identical to the parent cell. Meiosis increases genetic variation in the population. Each diploid cell undergoing meiosis can produce 2" different chromosomal combinations, where n is the haploid number. In humans the number is 223 , which is more ...
Retrovirus Production and Infection
Retrovirus Production and Infection

... II. If target cells grow in slightly different medium/FBS percentage (e.g. Phoenix in DMEM and 10% FBS, and BJ in DMEM:199 (4:1), 15% FBS + pyruvate): 1. Add FBS+medium components to get medium composition of target cells (e.g. for BJ add 1/4 of 199 containing pyruvate, 15% FBS, P/S and Glutamate an ...
The Recombinant DNA Controversy: A Contemporary
The Recombinant DNA Controversy: A Contemporary

... Why, then, is recombinant DNA technology so terrific or terrifYing, depending on your perspective? First, it is important to appreciate that processes very similar to those I have just described occur naturally. There are plasmids that can insert themselves into the bacterial chromosome and come out ...


... Another question is how far gene editing should go. Controversial Gene Editing For several years, scientists have changed genes in adult human cells to make them resist disease. But this spring, a team of Chinese researchers announced that they had used gene editing to alter DNA in human embryos. Th ...
Fertilization in Flowering plants. New Approaches for an Old Story
Fertilization in Flowering plants. New Approaches for an Old Story

... emb173, and to the medea mutant from U. Grossniklaus’ group (9, 14). The three genes corresponding to these described mutants are now often referred as FIE (for fie or fis3), MEA (for medea, fis1, f644, or emb173), and FIS2 (for fis2). MEA and FIE were shown to encode proteins from the polycomb grou ...
Biotechnology Laboratory
Biotechnology Laboratory

... conditions. For example Synechococcus 7002 grows rapidly at high light intensity (full sunlight) and 100% CO2 as well as under more moderate conditions. ...
duchenne muscular dystrophy (dmd) introduction
duchenne muscular dystrophy (dmd) introduction

... of 2,4 Mb of genomic DNA. It contains 79 exons, corresponding to 14kb, transcripted into mRNA. The large size of the gene could possibly explain the high mutation rate. The transcription occurs in all muscle cells (striated, smooth and cardiac cells) as well as in the brain, which explains the menta ...
Name: John D. Ransom Institution: Oklahoma State University
Name: John D. Ransom Institution: Oklahoma State University

... Very few, if any, high school t1iology textbooks have been written in such a manner that the r,1aterial is well integrated. Nost of the textl)ooks are sectioned into plants, animals, heredity, human biology, and other topics. 'Ilms, the student comes away from such a course with v.:!ry little insigh ...
Lab 9: Regulation of lactose metabolism
Lab 9: Regulation of lactose metabolism

... as an energy source; for example: maltose, glucose, lactose. In the 1950s François Jacob and Jacques Monod, two microbiologists at the Pasteur Institute in Paris, determined how E. coli regulates the production of ß-galactosidase, the enzyme necessary to cleave lactose into glucose and galactose for ...
Lecture 18: Lecture 18: Gene Expression II: From RNA to Protein
Lecture 18: Lecture 18: Gene Expression II: From RNA to Protein

... Third, translation starts at the first AUG. eIFs come off so that the large subunit can bind. ...
Examining the Process of de Novo Gene Birth
Examining the Process of de Novo Gene Birth

... For genes that arise from scratch, at some point in history there was a DNA sequence that was not a gene, and then that sequence somehow became a gene. Lest we begin to think in terms of magical transfiguration, it is worthwhile to consider what being a gene entails. First, genes are transcribed into ...
Lesson 15d Meiosis PPT - Educational Excellence
Lesson 15d Meiosis PPT - Educational Excellence

... • Somatic cells = any cell other than gametes, most of the cells in the body. • Gametes are produced Generalized animal life cycle by meiosis. ...
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Document

... (this translates to approximately 730 amino acids in the average polypeptide) • Only certain genes in a genome need to be expressed depending on: • Cell specialism • Environment • Therefore not all genes (are transcribed) and translated • If a cell needs to produce a lot of a certain protein (e.g. β ...
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File

... transmission of characteristics • Each characteristic controlled by a pair of factors in the cells of an organism • The two factors in each pair separate (segregate) during gamete formation and each gamete contain only one factor  Mendel’s Law of Segregation • Fusion of gamete restores the diploid ...
Ch. 5: Presentation Slides
Ch. 5: Presentation Slides

... staining with ethidium bromide, a dye that binds DNA • Particular DNA fragments can be isolated by cutting out the small region of the gel that contains the fragment and removing the DNA from the gel. • Specific DNA fragments are identified by hybridization with a probe = a radioactive fragment of D ...
2.7 DNA replication, transcription and translation
2.7 DNA replication, transcription and translation

... (this translates to approximately 730 amino acids in the average polypeptide) • Only certain genes in a genome need to be expressed depending on: • Cell specialism • Environment • Therefore not all genes (are transcribed) and translated • If a cell needs to produce a lot of a certain protein (e.g. β ...
Passive Transport
Passive Transport

... •Bacteria and plants have cell walls that prevent them from over-expanding. In plants the pressure exerted on the cell wall is called tugor pressure. •A protist like paramecium has contractile vacuoles that collect water flowing in and pump it out to prevent them ...
Identification of two novel mutations associated
Identification of two novel mutations associated

... 461 amino acid residues [3,4]. The human PS gene (PROS1) resides on chromosome 3 (3p11.1-q11.2) and contains 15 exons coding for 636 amino acid residues [5-7]. The human genome also contains a pseudogene for protein S (PROSP or PROS2) also located on chromosome 3 (3p21-cen) [5-7]. Hereditary deficie ...
Control, Genomes and Environment
Control, Genomes and Environment

Honors Biology Lab Manual
Honors Biology Lab Manual

... sometime are) the hormones that regulate your growth; they defend you from infection. In short, proteins proteins determine your body’s form and carry out its functions. ​DNA determines what all of these proteins will be. How does a cell “read” the chemical message coded in its DNA in the form of sp ...
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没有幻灯片标题

... cells that have different developmental fates. The problem of early development is to understand how this asymmetry is introduced: how does a single initial cell give rise within a few cell divisions to progeny cells that have different properties from one another? The means by which asymmetry is ge ...
Mitosis - MSU Billings
Mitosis - MSU Billings

... A. can usually be determined without the use of a microscope. B. can usually be predicted from the size of the organism. C. change as the organisms grow and age. D. vary considerably from 2 to over 1000 in different species. E. vary depending on the type of the cell in the same organism. 21. Eukaryo ...
To learn how to use a spectrophotometer. UV/visible spectrophotometer Quartz Cuvette
To learn how to use a spectrophotometer. UV/visible spectrophotometer Quartz Cuvette

... and carbohydrates). Light interacts with these molecules in different ways: reflection, absorption, transmission, and scattering. All biophotonic applications involve a light source that is passed through a target material and a detection sensor that reads the light emission from the material. A spe ...
BIO UNIT 6 CHS 6-7 Chromosomes_ Cell Cycle_ Cell Division_
BIO UNIT 6 CHS 6-7 Chromosomes_ Cell Cycle_ Cell Division_

...  Individual chromosomes gather at each of the poles. In most organisms, the cytoplasm divides (cytokinesis), forming two new cells.  Both cells or poles contain one chromosome from each pair of homologous chromosomes.  The two diploid cells produced by Meiosis I now enter a second meiotic divisio ...
Document
Document

... 1. More heat shock and stress-responsive genes (ex. those coding for heat shock proteins and chaperons) are highly expressed at 48˚C than are at lower temperatures, indicating that the fungus is under heat stress. 2. More putative virulence genes (ex. those coding for the proteins responsive to ox ...
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Vectors in gene therapy

Gene therapy utilizes the delivery of DNA into cells, which can be accomplished by several methods, summarized below. The two major classes of methods are those that use recombinant viruses (sometimes called biological nanoparticles or viral vectors) and those that use naked DNA or DNA complexes (non-viral methods).
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