• 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
Mackay, T. F. C. and R. R. H. Anholt (2007).
Mackay, T. F. C. and R. R. H. Anholt (2007).

... change. It is important to note that the presence of G ! E interaction means that particular pairs of strains could present different results in two laboratories, even for traits with high cross-environment genetic correlations. Other traits, other organisms G ! E interaction is by no means confined ...
Heterozygote Advantage and the Evolution of a Dominant
Heterozygote Advantage and the Evolution of a Dominant

... animals and seed plants, the diploid phase is dominant, and the haploid phase is reduced to one, or a very few cells, which are dependent on the diploid form. In other eukaryotic species, however, the haploid phase may dominate or the phases may be equally developed. Even though an alternation betwe ...
Chapter 5 Powerpoint
Chapter 5 Powerpoint

... This trait is sex-linked because the alleles for this trait are carried on the X-chromosome, one of the sex chromosomes. Color-blindness is caused by a recessive allele and because males get only one X-chromosome, they are more likely to be color-blind than females. ...
Microsatellite Polymorphism in the Heme Oxygenase
Microsatellite Polymorphism in the Heme Oxygenase

... (GT)n alleles are protective against smoking-induced emphysema (26) and restenosis after percutaneous transluminal angioplasty in arterial occlusive diseases (27). They showed that long (GT)n repeats reduced the level of HO-1 induction by oxidative stress in cultured cells and that short (GT)n allel ...
Ch 15b
Ch 15b

... • There are two normal exceptions to Mendelian genetics that involve genes located: 1. in the nucleus 2. outside the nucleus ...
Adaptation as organism design
Adaptation as organism design

... in mathematical terms and with reference to the genetics of populations. The formal link between mathematical population genetics and Darwinism was developed by R. A. Fisher (figure 1c), in his book The Genetical Theory of Natural Selection (Fisher 1930). Together with J. B. S. Haldane and Sewall Wr ...
Mendel and Heredity
Mendel and Heredity

... A Simple way to model inheritance is to use a pedigree (a family history that shows how a trait is inherited over several generations). Genetic Disorder: a disease or disorder that can be inherited. ◦ Carriers have alleles for disorders but do not show symptoms. They can pass on the disorder though. ...
chapter 14 - Dublin City Schools
chapter 14 - Dublin City Schools

KBS和KM
KBS和KM

... We are able to combine the speed of the traditional methods with the more comprehensive search of the GA. GA employ useful heuristics for achieving higher levels of support while maintaining high accuracy. The GA is about two or three orders of magnitude slower than a TI algorithm. Explainability is ...
Lecture Outline
Lecture Outline

Motion - TPAYNTER
Motion - TPAYNTER

... Sexual selection drives change in the frequency of a trait based on the ability to attract a mate. Common in populations where males and females look significantly different Some qualities that enhance mating success reduce odds of survival. ...
PHIL 481
PHIL 481

The Processes of Evolution - winterintersession09bousquet
The Processes of Evolution - winterintersession09bousquet

... A severe reduction in the size of a population or the founding of a new population by a small percentage of the parent population that results in only some genes surviving and characterizing the descendant population. ...
Document
Document

J.J. Bryan, V.L. Vance, M. Bauchet, C.L. Mouritsen
J.J. Bryan, V.L. Vance, M. Bauchet, C.L. Mouritsen

... – Samples (genotypes) are selected at random from each reference population and randomly placed in locations A-H in the P1 of a virtual pedigree. – Simulated mating occurs between the P1 pairs (A to B, C to D, etc.) wherein each SNP is considered independent from the results of all other at each int ...
q 2 = 0.81
q 2 = 0.81

... – Meiosis separates alleles into gametes – Gametes bear alleles in proportion to their frequency in the population… – there are p sperm with M and q sperm with m – there are p eggs with M and q eggs with m – Eggs and sperm combine to form zygotes… ...
Chromosome mutations
Chromosome mutations

... Consequences of duplications • most duplications have no phenotypic consequence • sometimes effects can be seen due to increased gene dosage • play a very important role in evolution: • increase gene number • evolution of new genes (paralogs!) ...
Topic 4:Forces that change gene and genotype frequencies File
Topic 4:Forces that change gene and genotype frequencies File

... under HW Equilibrium • Discuss examples of each force that destabilizes the HW Equilibrium • Appreciate the need to change gene and genotype frequencies in livestock improvement ...
Genetics Part Two
Genetics Part Two

... given the wrong baby at the hospital! Both parents are blood type A. The baby they have been given is blood type O. Could they have the right baby? ...
Does Speciation between Arabidopsis halleri and
Does Speciation between Arabidopsis halleri and

... Ever since Darwin proposed natural selection as the driving force for the origin of species, the role of adaptive processes in speciation has remained controversial. In particular, a largely unsolved issue is whether key divergent ecological adaptations are associated with speciation events or evolv ...
Detecting polygenic selection in marine populations by combining
Detecting polygenic selection in marine populations by combining

... large populations are expected to have on average smaller proportions of effectively neutral mutations (i.e., those for which s  1/Ne) (Ohta 1992). In theory, large populations are thus expected to be better adapted because even slightly advantageous mutations may contribute to adaptation, whereas ...
H 2
H 2

... What is the best donor or recipient to be? • Type O blood, lacking any sugars, is not attacked by antibodies in A, B, or AB blood, so is transfused safely to all – Type O blood is called the universal donor – The A and B antibodies in type O blood become too dilute to cause problems in the recipien ...
24. Genetics - WordPress.com
24. Genetics - WordPress.com

... Gametes carry the genetic information about an organism. The male gamete produce Sperm. The female gametes produce Eggs. The process in which one gamete is united with another is called Fertilization. ...
Mendel: Not a clue about chromosomes!
Mendel: Not a clue about chromosomes!

... that two or more independent events will occur together is the product of their individual probabilities • Probability in an F1 monohybrid cross can be determined using the multiplication rule • Segregation in a heterozygous plant is like flipping a coin: Each gamete has a ½ chance of carrying the d ...
Medelian Genetics Notes
Medelian Genetics Notes

...  9/16 of the offspring are dominant for both traits  3/16 of the offspring are dominant for one trait and recessive for the other trait  3/16 of the offspring are dominant and recessive opposite of the previous proportions; and  1/16 of the offspring are recessive for both traits. ...
< 1 ... 121 122 123 124 125 126 127 128 129 ... 377 >

Polymorphism (biology)



Polymorphism in biology is said to occur when two or more clearly different phenotypes exist in the same population of a species—in other words, the occurrence of more than one form or morph. In order to be classified as such, morphs must occupy the same habitat at the same time and belong to a panmictic population (one with random mating).Polymorphism as described here involves morphs of the phenotype. The term is also used somewhat differently by molecular biologists to describe certain point mutations in the genotype, such as SNPs (see also RFLPs). This usage is not discussed in this article.Polymorphism is common in nature; it is related to biodiversity, genetic variation and adaptation; it usually functions to retain variety of form in a population living in a varied environment. The most common example is sexual dimorphism, which occurs in many organisms. Other examples are mimetic forms of butterflies (see mimicry), and human hemoglobin and blood types.According to the theory of evolution, polymorphism results from evolutionary processes, as does any aspect of a species. It is heritable and is modified by natural selection. In polyphenism, an individual's genetic make-up allows for different morphs, and the switch mechanism that determines which morph is shown is environmental. In genetic polymorphism, the genetic make-up determines the morph. Ants exhibit both types in a single population.Polymorphism also refers to the occurrence of structurally and functionally more than two different types of individuals, called zooids within the same organism. It is a characteristic feature of Cnidarians.For example, in Obelia there are feeding individuals, the gastrozooids; the individuals capable of asexual reproduction only, the gonozooids, blastostyles and free-living or sexually reproducing individuals, the medusae.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report