Friday, June 24, 2011

physiology secrets

Reasoning out: Single gene traits obey All or None Law-comment
Yes. Single gene traits are discrete or qualitative and providing All or None phenotype (normal vs. affected) instead multiple genes that regulate height, skin colour-result in continuously varying phenotype. (Skin colour is controlled by 8 genes)Both single gene and polygenic traits can also be multifactorial i.e. they are influenced by environement.pure polygenic not influenced by environment are rare. (Eye colour-polygenic not environmental)

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