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Biology / Genetics and Heredity

Biology / Genetics and Heredity

You all know that bricks are the building blocks of houses, similarly cells are the building blocks of living organisms. Cells are specialized in shapes to carry out special functions.
Learn the structure of plant and animal cell, cell organelles and its functions.
Cell division: process of formation of two or more daughter cells from a single mother. Types of cell division :

  • Mitosis - occurs in somatic cells results in the formation of two daughter cells which are identical to parent cell
  • Meiosis - occurs in reproductive cells, results in the formation of 4 daughter cells, where each daughter cell is genetically different from parent cell
  • Amitosis - division of nucleus.

Learn in detail about mitosis and meiosis i.e. the stages of mitosis and meiosis and its significance
Learn about the cell cycle which undergoes different phases of division.
Do you know how the characteristics of parent are inherited to child, that's by the work of chromosomes which contain the genetic material.
Learn about the structure of chromosome and DNA. Also learn about sex-linked inheritance in man and Drosophila.

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You often think and try to relate your physical appearance and few traits with your family members isn't it? The traits or the characters are passed down from one generation to another by hereditary units called genes.

Gregor Johann Mendel the father of heredity, experimented on pea plant and established the principles of genetics. He concluded that F1 generation plants express the dominant trait, In F2 generation plants-recessive trait will reappear.

The principal of independent assortment states that the inheritance pattern of one trait will not affect the inheritance pattern of another pair.

Sometimes we wonder how life existed on earth. It was first by the formation af animao acids and other bio molecules. Charles Darwin was the first to formulate a scientific argument for the theory of evolution by means of natural selection and struggle of existence.

Advantages of evolution - basis for classification, tracing evolutionary relationships-fossils ,formation of new species, variation and human migration.

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