Inheritance: Difference between revisions
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Inheritance is the passage of hereditary traits passed down from one generation to another. These traits have been acquired from your parents and will be transferred to your children. This division of biology is called [[ | Inheritance is the passage of hereditary traits passed down from one generation to another. These traits have been acquired from your parents and will be transferred to your children. This division of biology is called [[Genetics|genetics]] <ref>Tortora G., Anagnostakos N. (1990) Principles of Anatomy and Physiology. New York: Harper and Row</ref>. In genetic speaking inheritance is [[DNA|DNA]] involved event, which passes on the traits to the next generation, including characteristics, diseases as well as personality | ||
Inheritance is sub-categorised into Dominant/Recessive, Co-dominance, Incomplete Dominance and Polygenic Inheritance based on the transfer and expression of certain allels over several generations from the parent to the progeny. Various factors such as enviromental conditions, diet and health induce certain changes in the organisms so that variation is carried out and organinsms can evolve so as to counteract the harsh changes they succumb to in their habitat. | |||
Dominant/Recessive: They are inheritance patterns that determine several phenotypic traits in organisms helping us predict the outcome of genetic disorders and key physical characteristics of progeny over several generations<ref>http://learn.genetics.utah.edu/content/basics/patterns/</ref>. Eg: Height in pea plants, Colour Blindness in humans.<br> | |||
Co-dominance: Two different alles equally expressed in an organism hence expressing unique characteristics.Therefore offsprings allels are neither recessive nor dominant. Eg: Blood groups in humans, Co-dominance in Roan cattle. | |||
Incomplete Dominance: Incomplete Dominance is a form of intermediate inheritance thus displaying a blend of alleles resulting in a third phenotype. Eg: Incomplete Dominance is snapdragon | |||
Polygenic Inheritance: Polygenic Inheritance is when multiple alleles are used to determine certain funtions or phenotypes in an organism<ref>https://www.khanacademy.org/science/biology/classical-genetics/variations-on-mendelian-genetics/a/polygenic-inheritance-and-environmental-effects</ref>. Eg: Height in humans, Coat colour in Labradors. | |||
=== References === | === References === | ||
<references /> | <references /> | ||
Revision as of 21:15, 4 December 2017
Inheritance is the passage of hereditary traits passed down from one generation to another. These traits have been acquired from your parents and will be transferred to your children. This division of biology is called genetics [1]. In genetic speaking inheritance is DNA involved event, which passes on the traits to the next generation, including characteristics, diseases as well as personality
Inheritance is sub-categorised into Dominant/Recessive, Co-dominance, Incomplete Dominance and Polygenic Inheritance based on the transfer and expression of certain allels over several generations from the parent to the progeny. Various factors such as enviromental conditions, diet and health induce certain changes in the organisms so that variation is carried out and organinsms can evolve so as to counteract the harsh changes they succumb to in their habitat.
Dominant/Recessive: They are inheritance patterns that determine several phenotypic traits in organisms helping us predict the outcome of genetic disorders and key physical characteristics of progeny over several generations[2]. Eg: Height in pea plants, Colour Blindness in humans.
Co-dominance: Two different alles equally expressed in an organism hence expressing unique characteristics.Therefore offsprings allels are neither recessive nor dominant. Eg: Blood groups in humans, Co-dominance in Roan cattle.
Incomplete Dominance: Incomplete Dominance is a form of intermediate inheritance thus displaying a blend of alleles resulting in a third phenotype. Eg: Incomplete Dominance is snapdragon
Polygenic Inheritance: Polygenic Inheritance is when multiple alleles are used to determine certain funtions or phenotypes in an organism[3]. Eg: Height in humans, Coat colour in Labradors.
References
- ↑ Tortora G., Anagnostakos N. (1990) Principles of Anatomy and Physiology. New York: Harper and Row
- ↑ http://learn.genetics.utah.edu/content/basics/patterns/
- ↑ https://www.khanacademy.org/science/biology/classical-genetics/variations-on-mendelian-genetics/a/polygenic-inheritance-and-environmental-effects