Question
Write short note: Cloning.
✓
Answer
- Cloning is the modern technique in which there is production of replica of any cell or organ or entire organism is done.
- There are two types of cloning, viz. (i) Reproductive cloning and (ii) Therapeutic cloning.
- Reproductive cloning: In reproductive cloning, a clone is produced by fusion of a nucleus of diploid somatic cell with the enucleated ovum of anybody. In the process, the sperm or male gamete is not needed.
- Therapeutic cloning: This technique is largely used for treatment purpose. Stem cells are derived from the cell formed in laboratory by the union of somatic cell nucleus with the enucleated egg cell.
- This technique is used for therapy of various diseases.
- Gene cloning can also be done to form millions of copies of same gene. Such genes are used for gene therapy and other purposes.
- Due to cloning technique, the inheritance of hereditary diseases can be controlled, continuation of generations can be achieved and certain characteristic genes can be enhanced.
- However, for human cloning, there is world-wide opposition due to ethical reasons.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Explain the working of an astronomical telescope using refraction of light.
State two uses each of the following compounds:
- Sodium hydroxide.
- Chlorine.
- Hydrogen.
- Hydrochloric acid.
An object $5\ cm$ high is held $25\ cm$ away from a converging lens of focal length $10\ cm$. Find the position, size and nature of the image formed. Also draw the ray diagram.
→What are Satellite Launch Vehicles? Explain a satellite launch vehicle developed by ISRO with help of systematic diagram.
Some symbols are given below. Explain those symbols. Which disasters may occur if those symbols are ignored?
What are the various ways in which a chemical equation can be made more informative? Give examples to illustrate your answer.
The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors.
- What is metal M?
- What is solution S? Is it acidic or alkaline?
- What is gas G?
- Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
- Is this reaction exothermic or endothermic?
Draw a figure explaining various terms related to a lens.
What is colourblindness?
What are symptoms of diseases like night blindness, rickets, beriberi, neuritis, pellagra, anaemia, scurvy?