Number Of Chromosomes

Every plant and animal has fixed number of chromosomes. For example, the human beings have 46 chromosomes in every cell. The chromosomes of each species occur in pairs, out of which one comes from father and the other comes from mother. In this way, we can say that...

Chromosomes

Chromosomes mean ‘coloured body’. Chromosomes are thread like bodies which are present in the nucleus of a cell and which becomes visible only during cell division. Chromosomes contain hereditary information of the cell. Chromosomes are made up of DNA (Deoxyribo...

Genetics

The term genetics was first of all coined by biologist William Bateson in 1906. It may be defined as the scientific study of the mechanism of inheritance and the causes of variation in living organisms. Heredity or Inheritance The transmission of characters,...

Variations and Mutations

It is commonly observed that the individuals of a species are alike, e.g. humans resemble one another and so do the monkeys and dogs. The reason for this resemblance is that the humans are produced by humans alone. In the same ways monkeys are produced by monkeys and...