• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Genetic Epidemiological Strategies to the Search for Osteoporosis
Genetic Epidemiological Strategies to the Search for Osteoporosis

... LS=lumbar spine, FN=femoral neck, TB=total body, BMD = bone mineral density ...
Lecture 12
Lecture 12

... • By examining haplotypes, scientists can identify patterns of genetic variation that are associated with health and disease states. For instance, if a haplotype is associated with a certain disease, then scientists can examine stretches of DNA near the SNP cluster to try to identify the gene or gen ...
Making Sense of Complicated Microarray Data
Making Sense of Complicated Microarray Data

... are plotted against each other element by element. Outliers in the original data (in red) are excluded from the remainder of the data (blue) selected on the basis of a two-standard-deviation cut on the replicates. ...
L - Centre for Genomic Regulation
L - Centre for Genomic Regulation

... Orthology definition is purely on evolutionary terms (not functional, not synteny…) There is no limit on the number of orthologs or paralogs that a given gene can have (when more than one ortholog exist, there is nothing such as “the true ortholog”) Many-to-Many orthology relationships do exist (co- ...
Evolution
Evolution

... Isolation is a vital tool of evolution. Natural selection cannot create a species by itself. Existing adaptations swamp any new mutations. New genes can get themselves established because they are overwhelmed by the old. Isolation fragments large populations into small groups. Small groups are where ...
AP Biology Objectives
AP Biology Objectives

... 8. Use the rule of multiplication to calculate the probability that a particular F 2 individual will be homozygous recessive or dominant. 9. Given a Mendelian cross, use the rule of addition to calculate the probability that a particular F2 individual will be heterozygous. 10. Explain why Mendel was ...
LINKAGE - TYPES OF LINKAGE AND ESTIMATION OF LINKAGE
LINKAGE - TYPES OF LINKAGE AND ESTIMATION OF LINKAGE

... 3. The distance between the linked genes determines the degree of strength of linkage. Closely located genes show stronger linkage that the widely located genes. 4. Linked genes do not always stay together, but are often exchanged reciprocally by cross over. Complete Linkage The genes closely locate ...
Genetics Topic Packet for the BLUE SENIORS
Genetics Topic Packet for the BLUE SENIORS

... Genetics: Assessment Statements  4.1.1 State that eukaryote chromosomes are made of DNA and proteins.  4.1.2 Define gene, allele and genome.  4.1.3 Define gene mutation.  4.1.4 Explain the consequence of a base substitution mutation in relation to the processes of transcription and translation, ...
Phylogenetic Portrait of the Saccharomyces cerevisiae Functional
Phylogenetic Portrait of the Saccharomyces cerevisiae Functional

... authors were able to determine that 40% of S. cerevisiae genes and 20% of C. elegans genes are orthologous and that these proteins carry out a set of core biological processes (intermediary metabolism, DNA/RNA metabolism, protein folding, trafficking, and degradation; Chervitz et al. 1998). The majo ...
Homeotic genes - Monroe County Schools
Homeotic genes - Monroe County Schools

... aniridia, a condition in which a person’s irises are underdeveloped or missing.  PAX6 also works across different species.  If a PAX6 gene from a human is inserted into an eyeless mutant fly, it will cause an eye to form wherever it is expressed.  This provides evidence that there may be a shared ...
Chapter 15: The Chromosomal Basis of Inheritance - AP
Chapter 15: The Chromosomal Basis of Inheritance - AP

... cell with two pairs of chromosomes. Sketch the two different ways these chromosomes might be arranged during metaphase I. See page 287 in your text for the labeled figure. The law of independent assortment states that each pair of alleles segregates, or assorts, independently of each other pair duri ...
Identification and functional analysis of novel genes
Identification and functional analysis of novel genes

... The analysis of the role of pleiotropic genes in germline development is rather difficult, but the RNAi technique provides an ideal tool since it enables the generation of a series of phenotypes of different strength. Using this approach, we were able to detect genes essential for germline developme ...
New Insights into Polycistronic Transcripts in Eukaryotes
New Insights into Polycistronic Transcripts in Eukaryotes

... operon with six sugar receptor genes in Drosophila. RT-PCR analyses suggested that it must be transcribed as a polycistronic transcript. These receptor genes span 11 kb of genomic DNA and encode gustatory receptors of sucrose, maltose, glucose, arabinose, trehalose, and glycerol. (4) In addition to ...
Multifarious microarray-based gene expression patterns in response
Multifarious microarray-based gene expression patterns in response

... Despite these interesting results, there are some methodological influencing conditions (different microarray platforms, RNA and array preparation methods, sampling points, cell populations) that make the comparison of the real exerciserelated responses difficult. Cross-platform comparisons identify ...
MEIOSIS LAB Name: AP BIOLOGY Period: Crossing Over during
MEIOSIS LAB Name: AP BIOLOGY Period: Crossing Over during

... In this example, crossing over has occurred in the region between the gene for spore color and the centromere. The homologous chromosomes separate during meiosis I. This time, the MI results in two cells, each containing both genes (1 tan, 1 wildtype); therefore, the genes for spore color have not y ...
comparative genomics, minimal gene
comparative genomics, minimal gene

... have been reported for several bacteria and two eukaryotes (TABLE 3). Although, for technical reasons, none of these studies succeeded in mutagenizing all the genes in the respective genomes, more than 50% of genes have been disrupted in each case, which is sufficient for reliable extrapolations. Th ...
Document
Document

... Reduced responding for ethanol-reinforced lever presses in PKC / mice compared with PKC +/+ mice. (A) Total number of ethanolreinforced lever presses in a 16-h period, averaged across 8 weeks of testing. PKC / mice (open bars) demonstrated a significantly lower total number of lever presses than PKC ...
Genes, Chromosomes and Human Genetics
Genes, Chromosomes and Human Genetics

... segregate randomly according to Mendel’s principle of independent segregation Proposed genes were located on the same chromosome Variation in the strength of linkage determined how genes were positioned on the chromosome ...
On intrapersonal reciprocity
On intrapersonal reciprocity

... Bob’s padumnal genome had the dictatorial role, the benefit would only be conferred if C V 0, whereas, if Bob’s madumnal genome had the dictatorial role, the benefit would be conferred whenever B > 2C. In the first case, Bob’s padumnal genome can be considered to have veto power as to whether the be ...
Number 52, 2005 11 Robert L. M etzenberg
Number 52, 2005 11 Robert L. M etzenberg

... Fungal Genetics Newsletter 52:11-13 I have been developing strains which I think will make it possible to produce "minimally-sheltered knockouts" of essential genes routinely. They could equally well be called "self-adjusting knockdowns" of essential genes. Such minimally-sheltered knockouts could g ...
Full Text  - Genes | Genomes | Genetics
Full Text - Genes | Genomes | Genetics

... authors were able to determine that 40% of S. cerevisiae genes and 20% of C. elegans genes are orthologous and that these proteins carry out a set of core biological processes (intermediary metabolism, DNA/RNA metabolism, protein folding, trafficking, and degradation; Chervitz et al. 1998). The majo ...
Example 2 – Human Skin colour
Example 2 – Human Skin colour

... Frumpy plants have small flowers with green petals, which are dominant traits. Large white flowers are recessive, and the genes are not linked. A plant with small green flowers was crossed with one with large white flowers and the offspring had either small green flowers or large green flowers. Dete ...
Complementation
Complementation

Elementary Genetics - American Herbataurus Society
Elementary Genetics - American Herbataurus Society

... concentrating genes of a particular ancestor in the herd or flock. Any linebreeding program requires a planned, systematic mating schedule. If practiced for a long period of time, linebreeding sooner or later must be directed through one or more of the ancestor’s sons or other descendants. A word o ...
Genomic conflicts: the concept Genomic conflict: Cytoplasmic male
Genomic conflicts: the concept Genomic conflict: Cytoplasmic male

... Genetic conflicts exemplify that evolution is about competition among alleles for representation in the future gene pool. It does not work for the "good" of the species, or even individual. Genes that advance their replication at the expense of the individual (and of unlinked genes) will be favoured ...
< 1 ... 43 44 45 46 47 48 49 50 51 ... 114 >

Essential gene



Essential genes are those genes of an organism that are thought to be critical for its survival. However, being essential is highly dependent on the circumstances in which an organism lives. For instance, a gene required to digest starch is only essential if starch is the only source of energy. Recently, systematic attempts have been made to identify those genes that are absolutely required to maintain life, provided that all nutrients are available. Such experiments have led to the conclusion that the absolutely required number of genes for bacteria is on the order of about 250-300. These essential genes encode proteins to maintain a central metabolism, replicate DNA, translate genes into proteins, maintain a basic cellular structure, and mediate transport processes into and out of the cell. Most genes are not essential but convey selective advantages and increased fitness.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report