• Study Resource
  • Explore
    • 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
The molecular basis of human retinal and vitreoretinal
The molecular basis of human retinal and vitreoretinal

... CSNB is heterogeneous in clinical and genetic terms. Currently, 11 genes are known to carry sequence alterations or mutations, which are associated with this disease (Figure 2, Table 1) (Audo et al., 2009; Bech-Hansen et al., 1998; Bech-Hansen et al., 2000; Dryja et al., 1993; Dryja et al., 1996; Dr ...
Polygenic inheritance of fruit size in red pepper
Polygenic inheritance of fruit size in red pepper

... is large, it is impossitole to single them out individually, A suggestion for simplifiestion would toe to study then in small groups if grouping is feasible on biologic*1 toases. Powers (1941) follows this method of approach in bis studies of inheritance of maturity in the tomsto toy using three dev ...
Natural Selection, Infectious Transfer and the Existence Conditions
Natural Selection, Infectious Transfer and the Existence Conditions

Problem Sets - MIT Biology
Problem Sets - MIT Biology

... dominant phenotypes were used (and these cannot be used in complementation tests), or strains that were not true-breeding were used. Using strains that are not true-breeding is not the proper way to do a complementation test, because then multiple genotypes and phenotypes are produced instead of jus ...
Storage cells in the bone marrow
Storage cells in the bone marrow

... RARA and the leukaemia cell of M3-like/t(15;17)/PLZFRARA AML • PLZF is a transfer factor that binds to co-repressors • PLZF-RAR therefore binds to corepressors through two binding sites —dependent on RARA and independent of it • Pharmacological doses of ATRA don’t break the second bond and therefor ...
The hidden complexity of Mendelian traits across yeast
The hidden complexity of Mendelian traits across yeast

... incomplete penetrance and variable levels of severity due to allelic interactions and background specific modifiers7. Recent genome-scale surveys of loss-of-function mutations have revealed considerable background effects in various model systems10-13 and human cell lines14-16, where the mutant phen ...
Genomic rearrangements account for more than one
Genomic rearrangements account for more than one

Applet for calculating heritability for threshold traits
Applet for calculating heritability for threshold traits

... the milk yield. For each A or B allele an individual has a yield increase of one kilogram. The alleles A and a have the same frequency in the distributions. For a realistic picture of the genetic background for milk yields, hundreds of gene pairs have to be involved. The milk yield has by selection ...
Baby Boom
Baby Boom

A Selective Sweep Driven by Pyrimethamine Treatment in Southeast
A Selective Sweep Driven by Pyrimethamine Treatment in Southeast

... association may be an effective way to locate genes under strong recent selection. (3) The width of the selective valley is consistent with predictions based on independent measures of recombination, mutation, and selection intensity, suggesting that we have reasonable estimates of these parameters. ...
Genetics and statistical association between lethal alleles and
Genetics and statistical association between lethal alleles and

... so that Pij n ≤ b·c n for any transient states Si and Sj, that is, Pij n → 0 as n → ∞. The former paragraphs and the last theorems allow us to conclude that after a small number of generations (in an interval from six to ten), only genotypes A and K remain in the population. The recombination rate r ...
The MIT Press Journals - Neural Network Research Group
The MIT Press Journals - Neural Network Research Group

Human mutations in glucose 6-phosphate dehydrogenase reflect
Human mutations in glucose 6-phosphate dehydrogenase reflect

Käfer, E. and D.  Luk
Käfer, E. and D. Luk

... (Table 1). Five other cases which are included at the end of that table may also represent new genes. These mutants, mus(FK125) mus(FK128), and mus(FK131 to 133) need further backcrossing, and both (FK124 and (FK128) have shown certain mus(FK125) produces very low and problems. highly variable survi ...
hirota - Genetics
hirota - Genetics

... containing these mutations were pili+ and others were pili-. That such phenotypically similar mutants were obtained as deletion mutations may suggest the presence of subunits in cistron C which probably control piliation. The pili+ mutants having deletions for all of cistron A and at the same time, ...
Multilocus genetic models of handedness closely resemble
Multilocus genetic models of handedness closely resemble

... are only a small number of published GWASs looking at handedness (which are reviewed below), data are analyzed here from a large molecular genetic study in order to look for associations with handedness on a genome-wide basis. These results will be presented in detail in a separate publication,17 bu ...
- Ex Student Archive
- Ex Student Archive

POPULATION GENETICS AND EVOLUTION LAB
POPULATION GENETICS AND EVOLUTION LAB

... population of 1000 individuals, 510 show the dominant phenotype. How many individuals would you expect for each of the possible three genotypes for this trait? ...
(reversed and/or heterotaxic) phenotype in SWV mice
(reversed and/or heterotaxic) phenotype in SWV mice

... the IV phenotype. Test matings of these phenodcviants, corroborated by PCR, have confirmed them to be + I + . Although the phenotypes of the affected SWV + I + and ivl + mice resembled those found in iviiu mice, the occurrence of situs inversus and heterotaxia were not independent of each other, and ...
1 Genetic constitution of a population
1 Genetic constitution of a population

... practical purposes a 'large population' is one in which the number of adult individuals is in the hundreds rather than in the tens. Differences of fertility and viability Though we are not at present concerned with the phenotypic effects of the genes under discussion, we cannot ignore their effects ...
A catalogue of imprinted genes and parent-of
A catalogue of imprinted genes and parent-of

... evidence can suggest the presence of genomic imprinting. Firstly, the strongest evidence is provided by direct detection of parent-of-origin-specific transcription from a gene, for example as seen with SNRPN which is only transcribed from the paternally inherited allele. Detection of imprinted gene ...
Understanding the pathological manifestations of aromatase excess
Understanding the pathological manifestations of aromatase excess

Lec17_heritability
Lec17_heritability

... • traits determined by the environment and many mendelian genes (at many loci) with small effects Most traits focus on: • phenotypes & heritability • statistical properties of population traits (e.g., mean, variance) ...
Exome sequencing as a tool for Mendelian disease gene discovery
Exome sequencing as a tool for Mendelian disease gene discovery

... largely been limited to assessing rare variants that have been found by the targeted sequencing of candidate genes or of genomic regions identified by linkage or genome-wide association studies (GWASs): the assumption is that rare variants that influence a trait colocalize with common variants that ...
Direct and indirect consequences of meiotic recombination
Direct and indirect consequences of meiotic recombination

< 1 ... 17 18 19 20 21 22 23 24 25 ... 504 >

Epistasis



Epistasis is a phenomenon that consists of the effect of one gene being dependent on the presence of one or more 'modifier genes' (genetic background). Similarly, epistatic mutations have different effects in combination than individually. It was originally a concept from genetics but is now used in biochemistry, population genetics, computational biology and evolutionary biology. It arises due to interactions, either between genes, or within them leading to non-additive effects. Epistasis has a large influence on the shape of evolutionary landscapes which leads to profound consequences for evolution and evolvability of traits.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report