Human Reproduction — BIOLOGY STD 12 Science — Question

Define transgenic animals. Write one benefit for man by transgenic animals.

How does over-exploitation of beneficial species affect biodiversity?

What are the suggested reasons for population explosion?

What do you mean by contraception? Name the natural methods of contraception.

Make a chart (with diagrammatic representation) showing restriction enzyme, the substrate DNA on which it acts on, the site at which it cuts DNA the product.

Differentiate between euchromatin and heterochromatin.

Name a bioactive molecule, its source organism and the purpose for which it is given to organ transplant patients.

Which chromosome carries the mutated gene causing β–thalassemia? What are the problems caused by the mutation?

Explain the role of different micro organism in the production of cheese.

Give the full form of ELISA. Which disease can be detected using it? Discuss the principle underlying the test.