AIIMS 2004
- Exam
- AIIMS
- Year
- 2004
- Subject
- Zoology
- Chapter
- Strategies for Enhancement in Food Production
AIIMS 2004 · Zoology · Strategies for Enhancement in Food Production
Assertion : Cattle breeds can be improved by superovulation and...
Assertion : Cattle breeds can be improved by superovulation and embryo transplantation.
Reason : Superovulation in high milk-yielding cows is induced by hormonal injection.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion
- BIf both assertion and reason are true but reason is not the correct explanation of assertion
- CIf assertion is true but reason is false
- DIf both assertion and reason are false.
Correct answer
B. If both assertion and reason are true but reason is not the correct explanation of assertion
Step-by-step solution
Superovulation is an effort to increase the fertility of cattle breeds. Inducing an animal to ovulate multiple oocytes can translate into producing more offspring from selected females. For superovulation. donor cows of particularly fine pedigree are treated with hormones (mainly FSH and LH) to increase the number of eggs released at ovulation - multiple ovulation (MO). The cows are artificially inseminated using semen from a proven bull.
After 6 - 7 days the embryos are collected non-surgically, and then implanted into recipient cows whose oestrous cycle is at the correct receptive stage - usually as the result of hormonal manipulation.