Information about Sex Limited Genes
Sex-limited genes are genes which are present in both sexes of sexually reproducing species but turned on in only one sex. In other words, sex-limited genes cause the two sexes to show different traits or phenotypes. An example of sex-limited genes are genes which instructs male elephant seal to grow big and fight, at the same time instructing female seals to grow small and avoid fights. These genes are responsible for sexual dimorphism.[1]
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References
1. ^ Dawkins, Richard (2004). "The Seal's Tale", The Ancestor's Tale, A Pilgrimage to the Dawn of Life. Boston: Houghton Mifflin Company. ISBN 0-618-00583-8.
For a non-technical introduction to the topic, see .
A gene is a locatable region of genomic sequence, corresponding to a unit of inheritance, which is associated with regulatory regions, transcribed regions and/or other functional sequence regions...... Click the link for more information.
Sexual reproduction is a union that results in increasing genetic diversity of the offspring. It is characterized by two processes: meiosis, involving the halving of the number of chromosomes; and fertilisation, involving the fusion of two gametes and the restoration of the
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species is one of the basic units of biological classification. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring.
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character is an attribute of an organism that allows it to be compared with another. In genetics this refers to heritable features which can exist in more than one state.[1] A trait
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phenotype describes the total physical appearance of an organism, as opposed to its genotype. This genotype-phenotype distinction was proposed by Wilhelm Johannsen in 1911 to make clear the difference between an organism's heredity and what that heredity produces.
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Male (♂) refers to the sex of an organism, or part of an organism, which produces small mobile gametes, called spermatozoa. Each spermatozoon can fuse with a larger female gamete or ovum, in the process of fertilisation.
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Mirounga
Species
M. leonina
M. angustirostris
Elephant seals are large, oceangoing mammals in the genus Mirounga, in the earless seal family (Phocidae).
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Species
M. leonina
M. angustirostris
Elephant seals are large, oceangoing mammals in the genus Mirounga, in the earless seal family (Phocidae).
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Female (♀) is the sex of an organism, or a part of an organism, which produces ova (egg cells). The ova are defined as the larger gametes in a heterogamous reproduction system, while the smaller, usually motile gamete, the spermatozoon is produced by the male.
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Sexual dimorphism is the systematic difference in form between individuals of different sex in the same species. Examples include size, color, and the presence or absence of parts of the body used in courtship displays or fights, such as ornamental feathers, horns, antlers or tusks.
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Richard Dawkins
Richard Dawkins lecturing on his book, The God Delusion.
Born March 26 1941
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Richard Dawkins lecturing on his book, The God Delusion.
Born March 26 1941
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The Ancestor's Tale
Author Richard Dawkins
Subject(s) Evolutionary biology
Publisher Boston: Houghton Mifflin
Publication date 2004
Pages 673
ISBN ISBN 0618005838
Preceded by A Devil's Chaplain
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Author Richard Dawkins
Subject(s) Evolutionary biology
Publisher Boston: Houghton Mifflin
Publication date 2004
Pages 673
ISBN ISBN 0618005838
Preceded by A Devil's Chaplain
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