Friday, May 4, 2012

Mendelian Principle's application to Human Population

Each character or trait of inheritance is determined by two factors.When the characters are inherited one factor may be obviously expressed while the other factor may be suppressed.The former is called dominant and the latter is called recessive.An individual carrying a dominant as well as recessive factor for any trait is called a hybrid and an individual possessing a pair of either dominant or recessive factors is known as pure with respect to that trait.

Law of segregation - The two factors of a character do not blend with each other but separate out during the formation of gemetes.

In every new generation there is a recombination of factors from the two parents and the new generation may show all conceivable combination of paternal and maternal characteristic traits.

Law of independent assortment- The factors controlling  the various characters are inherited ,independent of each other.This segregation and assortment of chromosomes  in sexual reproduction is one of the major causes of variation.

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