Introduction to Heredity and Variation

All organisms resemble, in structure, to their parents. The passing down of similar characters generation after generation is termed heredity. Heredity is controlled by genes. Differences in gene combinations lead to variations or differences even among members of the same family. The science of heredity and variation is termed Genetics.


The passing down of characters from parents to offspring is termed heredity. Heredity is controlled by genes.


There are so many differences between individuals of the same kind. For example, in the rose garden, the colour of rose flowers on different plants are different, puppies, of the same mother dog are different in their coat colour (colour of their hair or fur). All such individual differences are termed variations. Variations are due to genes or environment.