- 関
- anisogamy、heterogamy
WordNet
- (biology) reproduction by the union or fusion of two differing gametes (especially differing in size)
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2013/10/16 03:22:40」(JST)
[Wiki en表示]
Heterogametic sex (digametic sex) refers to the sex of a species in which the sex chromosomes are not the same. For example, in humans, males, with an X and a Y sex chromosome, would be referred to as the heterogametic sex, and females having two X sex chromosomes would be referred to as the homogametic sex.[1]
However, in birds, and some reptiles, males have two Z sex chromosomes and so are the homogametic sex, while females, with one Z and one W chromosome, are the heterogametic sex. Among the insects, Lepidopterans (butterflies and moths) have heterogametic females, but in Drosophila, males are the heterogametic sex.[2]
See also[edit]
- Haldane's rule
- XY sex-determination system
- ZW sex-determination system
References[edit]
- ^ King R.C.; Stansfield W.D.; Mulligan P.K. (2006). A Dictionary of Genetics (7th ed.). Oxford. p. 204.
- ^ James Franklin Crow, William F. Dove, ed. (2000). Perspectives on genetics: anecdotal, historical, and critical commentaries, 1987–1998. Madison, WI: University of Wisconsin Press. ISBN 978-0-299-16604-5.
English Journal
- Hybrid incompatibilities in the parasitic wasp genus Nasonia: negative effects of hemizygosity and the identification of transmission ratio distortion loci.
- Koevoets T, Niehuis O, van de Zande L, Beukeboom LW.SourceEvolutionary Genetics, Centre for Ecological and Evolutionary Studies, University of Groningen, Groningen, The Netherlands.
- Heredity.Heredity (Edinb).2012 Mar;108(3):302-11. doi: 10.1038/hdy.2011.75. Epub 2011 Aug 31.
- The occurrence of hybrid incompatibilities forms an important stage during the evolution of reproductive isolation. In early stages of speciation, males and females often respond differently to hybridization. Haldane's rule states that the heterogametic sex suffers more from hybridization than the h
- PMID 21878985
- Asymmetric and differential gene introgression at a contact zone between two highly divergent lineages of field voles (Microtus agrestis).
- Beysard M, Perrin N, Jaarola M, Heckel G, Vogel P.SourceDepartment of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland. mathias.beysard@ iee.unibe.ch
- Journal of evolutionary biology.J Evol Biol.2012 Feb;25(2):400-8. doi: 10.1111/j.1420-9101.2011.02432.x. Epub 2011 Dec 8.
- Secondary contact zones have the potential to shed light on the mode and rate at which reproductive isolation accumulates during allopatric speciation. We investigated the population genetics of a contact zone between two highly divergent lineages of field voles (Microtus agrestis) in the Swiss Jura
- PMID 22150868
Japanese Journal
- Change of heterogametic sex from male to female : Why so easy in the frog?
- Miura Ikuo,Ogata Mitsuaki
- Chromosome Science 16(1・2), 3-9, 2013
- NAID 40020034619
- Change of heterogametic sex from male to female: Why so easy in the frog?
- Miura Ikuo,Ogata Mitsuaki
- Chromosome Science 16(1+2), 3-9, 2013
- … In almost all mammals including humans, male is the heterogametic sex, while female is the heterogametic sex in all birds. … The above fact has contributed to creating a long-standing idea among the researchers that "Heterogametic sex once fixed is not changed so easily to the other". … A marginally evolved recent idea, however, proposes that heterogametic sex could be changed to each other far more frequently than we ever expected. …
- NAID 130003395824
- Sex chromosome evolution in moths and butterflies
- Sahara Ken,Yoshido Atsuo,Traut Walther
- Chromosome Research 20(1), 83-94, 2012-01
- … Lepidoptera, i.e. moths and butterflies, have a female heterogametic sex chromosome system, with most females having a WZ constitution while males are ZZ. … The female-heterogametic sex chromosome system has been conserved for at least 180 milliion years in the phylogenetic branch that combines Lepidoptera and Trichoptera. …
- NAID 120004027246
Related Links
- heterogametic [hĕtˌə-rō-gə-mĕtˈĭk] adjective Producing dissimilar gametes, such as those of human males, who produce two types of spermatozoa, one bearing the X-chromosome and the other bearing the Y-chromosome. Of or ...
- het·ero·ga·met·ic adjective \-gə-ˈ me-tik\ Definition of HETEROGAMETIC: forming two kinds of gametes of which one produces male offspring and the other female offspring <the human male is heterogametic> — het·ero·gam·e·ty \-ˈ ga-mə-tē\ ...
Related Pictures
★リンクテーブル★
[★]
- 関
- heterogametic、heterogamy、syngamy
[★]
- 英
- anisogamy、heterogamy、heterogametic
- 関
- 異型配偶、異型融合
[★]
- 関
- anisogamy、heterogametic