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12th Biology 2012 Set1 Outside Delhi Board Paper Solution

Question 21

(a)What is the programme called that is involved in improving success rate of production of desired hybrid and herd size of cattle?
(b)Explain the method used for carrying this programme for cows.

Answer
(a) The programme that is involved in success rate of production of desired hybrid and herd size of cattle is Multiple Ovulation Embryo Transfer Technology (MOET).
 
(b) For carrying MOET programme in cows, the steps taken are-
 
(i) Cow is administered with hormones, with FSH-like activity, to induce follicular maturation and super-ovulation i.e production of 6-8 ovum in one cycle.
(ii) Then the cow is mated with a bull or artificially inseminated.
(iii) The fertilized embryos are recovered at 8 celled stages non-surgically and transferred to surrogate mothers.
(iv) The cow is now ready for another round of super ovulation.