Artificial breeding of cattle is brought about by

Options

A. artifical insemination
B. superovulation and embryo transplantation
C. homozygotic twinning
D. all the above

Answer

**Step-by-Step Text Solution:**

1. **Understanding Artificial Breeding**: Artificial breeding refers to the methods used to breed animals with human intervention, as opposed to natural mating. This is done to enhance desirable traits in livestock.

2. **Identifying the Methods**: The question asks about the methods involved in artificial breeding of cattle. The two primary techniques are:
- **Artificial Insemination (AI)**: This method involves collecting semen from a superior bull and injecting it into the reproductive tract of a female cow to achieve fertilization.
- **Superovulation and Embryo Transfer**: This technique involves stimulating a superior cow to produce multiple eggs (superovulation) and then fertilizing these eggs either through mating with a bull or through artificial insemination. The fertilized eggs are then retrieved and implanted into surrogate mothers.

3. **Evaluating the Options**: The question provides multiple options regarding the methods of artificial breeding. The relevant methods include:
- Artificial Insemination
- Superovulation and Embryo Transfer
- Homozygotic Twinning (which is not a method of artificial breeding)

4. **Conclusion**: Since both Artificial Insemination and Superovulation with Embryo Transfer are recognized methods of artificial breeding, the correct answer to the question is that artificial breeding of cattle is brought about by these techniques.

5. **Final Answer**: The correct option is that artificial breeding of cattle is brought about by Artificial Insemination and Superovulation with Embryo Transfer.

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