question

Asked by isha007 | 26th Dec, 2009, 11:11: AM

Expert Answer:

 

Chromosomes are thread like structures that carry the hereditary information of living organisms and are found in the nucleus of their cells. A normal human body cell has 46 chromosomes comprising 22 matured pairs (called autosomes) and two sex chromosomes (X and Y).

Gene is the functional segment (cistron) of DNA (Deoxyribonucleic acid) that is required to synthesise a complete polypeptide chain.

The visible effects of genes are expressed in proteins. Genes control the structure of the proteins they produce via the genetic code and also the amount to be produced and the timing of production.

DNA is a complex giant molecule that carries the secret of life. It is DNA which has all the information needed to build, control and maintain a living organism. In organism DNA is organised into chromosomes and contained in the cell nucleus.

Answered by  | 31st Dec, 2009, 12:22: PM

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