Assetion : Cattle breeds can be improved by superovulaton and embryo transplantaion.
Reason : Superovulation in high milk-yielding cows is induced by hormonal injection.

Options

A. If both assertion and reason are true and reason is the correct explaination of assertion
B. If both assertion and reason are true but reason is not correct explaination of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

B

Explanation

Superovulation is an effort to increase the fertility of cattle breeds.Inducing an animal to ovulate multiple oocytes can translate into producing more offsprings from selected females.Superovulation and embryo transfer involves the following step.
Donor cows of particularly fine edigree are treated with hormones (mainly FSH and LH)to increase the number of eggs released at ovulation-multiple ovulation (MO)
The cows are artificially inserminted using semen from a provwen bull.
After 6-7 days the embryos are flushed out non-surgically using a eatheter placed into the uterus.This is possible because,In cattle,there is delay in embryos becoming implanted in the uterine wall.On average ,4-7 embryos are collected.
The embryos may then be implanted into recipient cows whose oestrous cycle is at correct receptive stage-usually as the result of hormonal manipulation.
Embryos may be frozen and stored,using techniques similar to those applied to semen,(though preeise control of the regime is somewhat more eritical).Farmers may,of course,buy-in embryos from sources anywhere in the world to tranfer to their own recipient cows.Embryo tranfer has the potential to bring about genetic improvement twie as fast as AI(Artificial insemination)alone.