/men"dl iz'euhm/, n.
the theories of heredity advanced by Gregor Mendel.
Also, Mendelianism /men dee"lee euh niz'euhm, -deel"yeuh-/.
[1900-05; MENDEL + -ISM]

* * *

      the principles of heredity formulated by the Austrian Augustinian monk Gregor Mendel in 1865. These principles compose what is known as the system of particulate inheritance by units, or genes. The later discovery of chromosomes as the carriers of genetic units supported Mendel's two basic laws, known as the law of segregation and the law of independent assortment. In modern terms, the first of these states that genes are transferred as separate and distinct units from one generation to the next. The two members (alleles (allele)) of a gene pair, one on each of paired chromosomes, separate during the formation of sex cells by a parent organism. One-half of the sex cells will have one form of the gene, one-half the other form; the offspring that result from these sex cells will reflect those proportions. A modern formulation of the second law, the law of independent assortment, is that the alleles of a gene pair located on one pair of chromosomes are inherited independently of the alleles of a gene pair located on another chromosome pair and that the sex cells containing various assortments of these genes fuse at random with the sex cells produced by the other parent.

* * *

Universalium. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • mendelism — MENDELÍSM s.n. Concepţie care susţine că transmiterea caracterelor ereditare se face potrivit legilor dominaţiei, segregării şi combinării independente a caracterelor. – Din fr. mendélisme. Trimis de LauraGellner, 27.05.2004. Sursa: DEX 98 … …   Dicționar Român

  • Mendelism — Mendelism. См. Менделизм. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Mendelism — (n.) 1903, in reference to the work of Gregor Johann Mendel (1822 1884), Austrian biologist who enunciated the laws of heredity. Related: Mendelian …   Etymology dictionary

  • Mendelism — [men′dəl iz΄əm] n. the theory of heredity as formulated by Gregor Mendel Mendelist adj., n …   English World dictionary

  • Mendelism — mendelizmas statusas T sritis augalininkystė apibrėžtis Organizmų požymių paveldimumo tyrinėjimai, paremti eksperimentiniu hibridų ir jų palikuonių tyrimu. Tai pradinis genetikos tarpsnis. atitikmenys: angl. Mendelism rus. менделизм …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • Mendelism — Mendelian Men*de li*an, prop. a. [See {Mendel s law}.] 1. (Biol.) Pert. to Mendel, or to Mendel s law; as, Mendelian inheritance. [Webster 1913 Suppl.] 2. (Biol.) Behaving or being in accordance with Mendel s laws of inheritance; said of the… …   The Collaborative International Dictionary of English

  • Mendelism — noun Date: 1903 the principles or the operations of Mendel s laws; also Mendelian inheritance • Mendelist adjective or noun …   New Collegiate Dictionary

  • Mendelism — n. [Gregor Mendel] Particulate inheritance of chromosomal genes …   Dictionary of invertebrate zoology

  • Mendelism — noun a) The whole body of principles of heredity formulated by , that represent the basis of genetics. b) The study of heredity of character …   Wiktionary

  • Mendelism — The principles of genetics, specifically of single gene traits, based on the work of Gregor Mendel (1822 84), a Moravian monk and biologist who established the laws that are the foundation of classical genetics. Mendel lived in an Augustinian… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”