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Topic: Inheritance of acquired traits

Related Topics

Lamarckian

Pangenesis

Lamarck

The Origin of Species

Epigenetic inheritance

Cultural evolution

Giraffe

August Weismann

Genetics

Spontaneous generation

Fair use

Palaeontology

Inheritance

Georges Cuvier

Transcription (genetics)

	Lamarckism - Wikipedia, the free encyclopedia
		Lamarckism holds that traits acquired (or diminished) during the lifetime of an organism can be passed on to the offspring.
		Inheritance of acquired traits – Individuals inherit the traits of their ancestors.
		The mechanisms of inheritance were not elucidated until later in the 19th Century, after Lamarck's death.
	en.wikipedia.org /wiki/Lamarckism (294 words)

	Heredity - Wikipedia, the free encyclopedia
		Heredity (the adjective is hereditary) is the transfer of characteristics from parent to offspring, either through their genes or through the social institution called inheritance (for example, a title of nobility is passed from individual to individual according to relevant customs and/or laws).
		The inheritance of acquired characteristics was shown to have little basis in the 1880s when August Weismann cut the tails off mice to find that their offspring did develop tails.
		The inheritance of acquired characters appealed to the communist leaders, Lysenkoist movement being led by Trofim Lysenko.
	www.wikipedia.org /wiki/Hereditary (639 words)

	MSN Encarta - Search View - Genetics
		In order for inherited traits to be transmitted from parent to child, the genetic information encoded in DNA must be copied with great precision during cell division.
		One X chromosome is inherited from the mother and one X chromosome is inherited from the father.
		Huntington’s disease, a condition characterized by involuntary movements, dementia, and eventually death, is caused by the inheritance of a pair of alleles in which a defective allele dominates the normal allele for the gene.
	encarta.msn.com /text_761563786__1/Genetics.html (14659 words)

	Jean-Baptiste Lamarck - Wikipedia, the free encyclopedia
		Lamarck is remembered today mainly in connection with a discredited theory of heredity, the "inheritance of acquired traits", but Charles Darwin and others acknowledged him as an early proponent of ideas about evolution.
		Lamarck's own theory of evolution was in fact based on the idea that individuals adapt during their own lifetimes and transmit traits they acquire to their offspring.
		Darwin and many contemporaries also believed in the inheritance of acquired characteristics, an idea that was much more plausible before the discovery of the cellular mechanisms for genetic transmission.
	en.wikipedia.org /wiki/Lamarck (769 words)

	Heredity and Heritability
		Inheritance or heredity was a focus of systematic research before its inclusion as a key concept within evolutionary theory.
		For example, medical geneticists may discover a pattern of inheritance for a disease in a family that leads them to hypothesize that there is a gene (or a number of genes) responsible for the development of the trait in individual humans.
		Assessing the proportion of the variation of a trait in a population that is due to genes is achieved by a statistical method called the analysis of variance.
	plato.stanford.edu /entries/heredity (5798 words)

	Nonsense in schoolbooks: 'The Imaginary Lamarck' (Site not responding. Last check: 2007-10-14)
		To perpetuate that myth, the textbook-writers lead students to believe that Lamarck embraced the inheritance of acquired characteristics, that Darwin rejected it, and that this was the crucial difference between the two men's ideas about evolution.
		The acquired characteristics that figured in Lamarck's thinking were changes that resulted from an individual's own drives and actions, not from the actions of external agents.
		This is proof that traits acquired during a lifetime are not passed on to the next generation.
	www.textbookleague.org /54marck.htm (2837 words)

	MSN Encarta - Heredity
		Through the diversity of proteins they code for, genes influence or determine such traits as eye color, the ability of a bacterium to eat a certain sugar, or the number of peas in a pod.
		Sexual reproduction results in offspring with diverse traits, and is the predominant form of reproduction among plants, animals, and most other organisms.
		If a child inherits one dominant allele and one recessive allele he or she typically does not have the disease.
	encarta.msn.com /encyclopedia_761564762/Heredity.html (1438 words)

	Epigenetic inheritance - Articles and Information (Site not responding. Last check: 2007-10-14)
		Epigenetic inheritance is the transmission of information from a cell or multicellular organism to its descendants without that information being encoded in the nucleotide sequence of the genes.
		Epigenetic inheritance occurs in the development of multicellular organisms: dividing fibroblasts for instance give rise to new fibroblasts even though their genome is identical to that of all other cells.
		Epigenetic Inheritance Systems (EISs) allow cells of different phenotype but identical genotype to transmit their phenotype to their offspring, even when the phenotype-inducing stimuli are absent, as is often the case.
	www.ezresult.com /article/Epigenetic_inheritance (816 words)

	Burns - Studies in Osteopathic Sciences - Vol 1 - Chapter 19 (Site not responding. Last check: 2007-10-14)
		The habit is not inherited, it was acquired by the child during gestation.
		The inheritance of acquired mutilations is apparently impossible, though deformities may be inherited, just as normal structure is. Peculiarities or deformities which render the individual less apt to marry, or less productive, are not perpetuated for many generations, unless there is very persistent inbreeding.
		Whether this is indicative of the inheritance of acquired characteristics, or whether the facts are to be explained by the supposition that the same instability is at the basis of all these conditions, is a question whose discussion is beyond the limits of such a volume as this.
	www.meridianinstitute.com /eamt/files/burns1/bur1ch19.html (3222 words)

	Jean-Baptiste Lamarck - Wikibooks
		The inheritance of acquired traits, also known as his 'Second Law' in Philosophie Zoologique, is the idea that the traits of an organism that undergo hypertrophy will be inherited by the next generation.
		We now know that the inheritance of acquired characteristics is not an actual mechanism of evolution.
		Instead of saying that the traits one organism acquires during its lifetime to better its success, Darwin said that these characteristics would eventually reveal themselves in offspring and later generations instead of in the present organism.
	en.wikibooks.org /wiki/Jean-Baptiste_Lamarck (494 words)

	Luther Lee Bernard: The Significance of Environment as a Social Factor. (Site not responding. Last check: 2007-10-14)
		Darwin's theory of pangenesis must be considered apart from his earlier gross environmental studies of evolution on the basis of geographic distribution, as an attempt to use the new knowledge of the cell as a basis for the explanation of the assumptions regarding transmission to which his general geographical studies had led him.
		With the elimination of these two large classes of traits from the possibility of inheritance under the Mendelian conception of heredity's inheritance as a biological and a psycho-social concept is greatly diminhed and that of environment is of necessity correspondingly increased.
		The old notion, still popularly current, that inheritance covers everything received in the organism up to the point of birth, must go by the board, while room is made for the operation of environmental forces throughout the period of the development of the organism and even before that development begins as a new entity.
	spartan.ac.brocku.ca /%7Elward/Bernard/Bernard_1922a.html (8333 words)

	Intro to Genetics
		The factors were inherited in pairs, with each generation having a pair of trait factors.
		Mendel analyzed each trait for separate inheritance as if the other trait were not present.The 3:1 ratio was seen separately and was in accordance with the Principle of Segregation.
		The patterns of Mendelian inheritance explained the perseverance of rare traits in organisms, all of which increased variation, as you recall that was a major facet of Darwin's theory.
	www.emc.maricopa.edu /faculty/farabee/BIOBK/BioBookgenintro.html (2465 words)

	Epigenetics - Wikipedia, the free encyclopedia
		The term epigenetics has over time been used in various senses, in part because the Greek prefix epi- has at least six meanings in English (including 'on', 'after' and 'in addition'), but also because various theories of epigenetic development, inheritance, and evolution have been proposed (see Historical notes below).
		See epigenetic inheritance for a more detailed discussion.
		Various aspects of the modern understanding of epigenetic inheritance are reminiscent of Jean-Baptiste Lamarck's ideas about evolution.
	en.wikipedia.org /wiki/Epigenetic (686 words)

	Genetics: Using the Virtual FlyLab
		The purpose of this lesson is for students to discover about the genetic inheritance of traits, through the design and analysis of on-line genetic experiments utilizing the Interactive Virtual FlyLab.
		Once each team has recorded sufficient data and has reached a conclusion about the inheritance of that trait, a research report on their findings should be completed.
		Once each team has recorded sufficient data, analyzed it for patterns, and has reached a conclusion about the inheritance of their trait, a research report on their findings should be completed.
	www.gsu.edu /~mstjrh/genetics.html (611 words)

	autosomal recessive inheritance - General Practice Notebook (Site not responding. Last check: 2007-10-14)
		Autosomal recessive inheritance is characterised by a disease trait only appearing in the homozygote carrier.
		There should be a small risk of offspring acquiring a trait: normal alleleic segregation would predict only 1 in 4 being affected.
		A minority of autosomal recessive traits are due to inborn errors of metabolism with defective enzymes.
	www.gpnotebook.co.uk /cache/-1308229598.htm (271 words)

	Niche Construction, Biological Evolution and Cultural Change
		Major differences between genetic inheritance and ecological inheritance include that the former is transmitted internally from only one (asexual) or two (sexual) parents to offspring via reproduction, whereas the latter persists, or is actively maintained from one generation to the next, in the external environment, by multiple organisms.
		The assumption that human cultural inheritance can directly bias human genetic inheritance may also be acceptable even when the source of the natural selection pressure that is modified by culture is no longer human, provided the relationship between whatever cultural trait is being expressed, and whatever natural selection pressure it is modifying, is sufficiently direct.
		As a result, the adaptive knowledge acquired through these ontogenetic processes cannot be inherited because all the knowledge gained by individuals during their lives is erased when they die.
	www.bbsonline.org /documents/a/00/00/05/28/bbs00000528-00/bbs.laland.html (13385 words)

	A Persistent View
		Ted Steele's theories about the inheritance of acquired immunological capabilities and John Cairns' articles on directed evolution in bacteria marked the beginning of a new round of experiments that were explained with Lamarckian theories.
		This type of inheritance is illustrated by the maintenance of the induced state in the lac operon of E.
		Though at first glance the inheritance of acquired characteristics reviewed by Landman resembles the Lamarckian concepts of environmentally-induced inherited changes, the distinction between them lies in the recognition that acquired inheritance is not a universal mechanism of inheritance as implied by Lamarck, but is instead one of the many facets of molecular genetics.
	www.asa3.org /ASA/PSCF/2000/PSCF6-00Cook.html (6934 words)

	ZOO 317 Lecture 1 - GENETICS AS A HUMAN ENDEAVOR (Site not responding. Last check: 2007-10-14)
		Complex inherited traits are currently viewed as the sum of actions of many genes.
		Lamarck proposed that acquired traits could be passed on to offspring.
		Darwin also believed that acquired traits could be passed to offspring but thought a more important factor in adaptation is natural selection.
	www.utexas.edu /courses/gene/L01.htm (401 words)

	Heredity and Heritability
		Discrete or discontinuous traits contrast with continuous or quantitative traits.
		The study of quantitative or continuous traits can be carried out by looking simply at phenotypes.
		Developmental systems theorists take these empirical findings about multiple inheritance systems to support their view that genes play no privileged role in evolution and development.
	setis.library.usyd.edu.au /stanford/entries/heredity (5798 words)

	[No title]
		This permits a form of Lamarckian inheritance - the inheritance of acquired traits.
		bias; the tendency of individuals to adopt a trait may depend on the frequency with which the individual encounters that trait.
		In general, if two conditions are met - #1 the transmission rule of the trait is linear and #2 the choice of teachers/models is random - then it can be shown that transmission of the cultural trait itself does not introduce evolutionary forces.
	helix.biology.mcmaster.ca /3j3/3j3.culture.txt (722 words)

	Answer Key for 1403 Test (Site not responding. Last check: 2007-10-14)
		Lamarck would have accounted for this phenomenon by his mechanism of inheritance of acquired traits.
		Thus, the daughter cells of bacteria exposed to antibiotics would inherit the changed genome, and be less susceptible to antibiotics, having inherited a trait that was acquired by the parental cell.
		Individuals who have inherited two copies of the mutated pigmentation gene will be albino (with red eyes) no matter what the genotype at the other gene that affects eye color.
	www2.tltc.ttu.edu /dini/key4(1403)02.htm (884 words)

	Evolution
		We are all aware of how selection for traits can alter the proportion of alleles in a population.
		Many genes whose traits are fundamental to living organisms are highly conserved.
		The new allele may not infer any advantage on an organism but if it is not too detrimental the change may be incorporated into the population.
	alpha1.fmarion.edu /~bio105k/evolution.html (863 words)

	Re: 50 things every biologist should know
		What is meant by the inheritance of acquired traits, who made this
		> of his day that acquired traits are then inherited.
		It was a kind of inheritence of acquired
	www.news-reader.org /article.php?group=bionet.molbio.evolution&post_nr=7524 (116 words)

	Encyclopedia: Lamarck (Site not responding. Last check: 2007-10-14)
		Jean-Baptiste Pierre Antoine de Monet, Chevalier de Lamarck (August 1, 1744 - December 28, 1829) was a major 19th century naturalist, who was one of the first to use the term biology in its modern sense.¹
		On the other hand, the inheritance of acquired characteristics is now widely refuted.
		(Darwin, incidentally, acknowledged his theory would remain somewhat incomplete if the mechanism for inheritance could not be discovered.)
	www.nationmaster.com /encyclopedia/Lamarck (795 words)

	Bibliographic Essays: Life Sciences in the Twentieth Century
		A comprehensive survey of the topic is L.I. Blacher's The Problem of the Inheritance of Acquired Characteristics, English translation edited by Frederick Churchill (Washington, D.C.: Smithsonian Institution Library, 1982).
		Perhaps in response to the Lysenko affair in the USSR in the 1940s and 1950s, the author is particularly vehement in denying the possibility of inheritance of acquired traits.
		But his conclusions about the inheritance of acquired traits must be taken with a grain of salt.
	www.hssonline.org /teach_res/essays/allen/allenp4.html (1143 words)

	Darwin’s Impact: Social Evolution in America, 1880–1920 (Site not responding. Last check: 2007-10-14)
		Mendel showed that both dominant and recessive genes were inherited by offspring from their parents and this determined the pattern of natural selection that occurred.
		He entered the nurture versus nature debate which involves the issue of acquired versus inherited traits in “Broadening the Way to Success” (1886) by arguing, contrary to the conservative Social Darwinists, that the worshipers of genius and the expounders of heredity alike were wrong in maintaining that these qualities were inherent.
		The different moral codes and political and social conflict that ensued are simply evidence of the ambiguity of the Darwinian inheritance and the durability of parts of the Christian tradition.
	www.thoemmes.com /american/darwin_intro.htm (4815 words)

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