Question

Maximum number of existing transgenic animals is of?

Answer 1

Hint: Animals that have been cloned are Transgenic animals. Cloning is done by inserting a gene into the genome of the animal. Recombinant DNA technology is used to construct the gene which will express desirable qualities during the growth and development of the recipient animal. This process is called transgenesis which includes the addition of foreign genetic information to animals and inhibition of specific endogenous gene expressions.

Complete answer:
A transgenic animal is one that carries foreign gene that has been inserted into its genome. Transgenic technology has led to the development of genetically altered pigs, fishes, live stocks, mice etc.
The first transgenic was a super mouse created by Ralph Brinster and Richard Palmiter in \[1982\]. It was created by inserting a human growth hormone gene into the mouse genome.
Over \[95\] percent of transgenic animals are genetically modified rodents, predominantly mice. They act as important tools for researching human disease, used to understand the function of gene and to determine responses to a therapeutic intervention. The monoclonal anticorps are used in humans too.
Transgenesis is done in mice through microinjection and embryonic manipulation methods. Transgenic animals are more advantageous to humans. They serve as a disease model, as a bioreactor for pharmaceuticals, biological product manufacturing etc.

Note:
Mice continues to be an animal of choice for most transgenic experiments. Some of the other transgenic animals are super fish, Glo fish, Enviro pig, Transgenic sheep, Transgenic monkey etc. There are some issues concerned with transgenic animals such as moral & ethical hazards, long term effects on the environment and health risks to the transgenics.