Wednesday, July 3, 2013

Genetics

The term Genetics is derived from the Greek word gen which means to become or to grow into.It is the science of inheritance which tries to explain how charactors are transmitted through generations.

Genetics is the scientific study of the laws of inheritance.By inheritance is meant the transmission of biological characteristics from one generation to another generation.Inheritance has two main components.


Heredity which is concerned with the factors responsible for the resemblance between parents and their offspring.

Variation which is concerned with the forces  or influences due to which no two organisms are exactly alike. There are three general branches of Genetics

Formal Genetics deals with the laws of inheritance postulated by Gregor Mendel the father of formal or classical or statistical genetics.

Molecular Genetics is the study of the biochemical element of inheritance viz  the DNA or the Deoxyribonucleic Acid which is material component of the gene.

Population Genetics is concerned with the application of genetic principles to human population with the ultimate aim of biologically improving the human species.

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