What is genetics ?
Genetics (from ancient greek ?e?et???? genetikos, ''genetive'' and that from
???es?? genesis. ''origin'' [1][2][3]), a discipline of biology, is the science of
genes, heredity, and variation in living organisms.[4][5] the fact that living things
in herti traits from their parents has been used since prehistoric times to improve
crop plants and animals through selective breeding. However , the modern
science of genetics, which seeks to understand the process of inheritance, only
began with the work of Gregor Mendel in the mid-19th century [6] although
he did not know the physical basis for heredity, Mendel observer that organisam
inherit traits via discrete units of inheritance, which are now called genes
Genes correspond to regions within DNA , a molecule composed of a china of
four different types of nucleotides-the sequence of these nucleotides is the genetics
information organisms inherit.