Breeding and Biotechnology Two marks

May 24-2020

Important Two Mark Questions2

Breeding and Biotechnology Two Mark

முக்கியமான இரண்டு மதிப்பெண் கேள்விகள் மற்றும் பதில்கள்

Gene therapy refers to the replacement of defective gene by the direct tranfer of functional genes into humans to treat genetic disease or disorder

A group of plants produced from a single plant through vegetative or asexual reproduction are called Clone

An organism have more than two sets of chromosomes are called polypoid

Inbreeding refers to the mating of closely related animals within the same breed for about 4-6 generations

The small circular double stranded DNA molecule found in the cytoplasm of bacterial cell and separated from chromoosomal DNA is called a plasmid. It acts as a vector in genetic engineering

Pureline is "the progeny of a single individual obtained by self breeding". This is also called as Individual plant slection

It is a product of out breeding. A male donkey is crossed with a female horse. Mule is superior to horse in strength, intelligence, ability to work and resistance to disease but they are sterile.

It is a chemical agent which can induce Polyploidy

The factors which induce mutations are known as Mutagens or Mutagenic agents. e.g. Nitrous acid.

The Superiority of the Hybrid is obtained by cross breeding is called as Heterosis or Hybrid vigour

Plant breeding is the art of of developing economically important plants with superior quality