Study of formation, growth and development of new individual from an egg is

Options

A. apomixis
B. embryology
C. embryogeny
D. cytology

Explanation

To solve the question regarding the study of formation, growth, and development of a new individual from an egg, we can analyze the options provided and define each term step by step.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Epomixis**: This refers to a type of asexual reproduction where seeds are formed without fertilization. The egg develops directly into an embryo through mitosis, bypassing the fertilization process.
- **Embryology**: This is the branch of biology that studies the development of embryos from the fertilization of the egg to the formation of a new individual. It includes the study of gametes and their fertilization.
- **Embryogeny**: This specifically refers to the process of formation and growth of embryos. It focuses on how embryos develop from the fertilized egg.
- **Cytology**: This is the study of cells, including their structure and function. It does not specifically focus on the development of embryos or new individuals.

2. **Analyzing the Question**:
- The question asks for the study that specifically focuses on the formation, growth, and development of a new individual from an egg. This implies a focus on the embryonic stage after fertilization.

3. **Selecting the Correct Option**:
- **Epomixis** does not involve fertilization and thus does not fit the question's criteria.
- **Embryology** encompasses the study of the development of embryos from fertilization onwards, making it a suitable choice.
- **Embryogeny** also fits, as it deals with the growth and formation of embryos, but it is more specific to the developmental process rather than the broader study.
- **Cytology** is not relevant to the question as it does not deal with embryonic development.

4. **Conclusion**:
- The most appropriate term that encompasses the study of formation, growth, and development of a new individual from an egg is **Embryology**.

### Final Answer:
**Embryology**