Genetics deal with

Options

A. Heredity and variations
B. Heredity
C. Mutations
D. Nuclear and cytoplasmic inheritance.

Answer

**Step-by-Step Solution:**

1. **Understanding Genetics**: Genetics is the branch of biology that studies heredity and variation in organisms. It focuses on how traits and characteristics are passed from parents to offspring.

2. **Defining Heredity**: Heredity refers to the process by which traits and characteristics are transferred from one generation to the next. This includes physical traits, behaviors, and other inherited features.

3. **Defining Variation**: Variation is the appearance of new traits or characteristics in the progeny that differ from those of the parents. This can include differences in physical appearance, genetic makeup, and other inherited traits.

4. **Identifying Key Concepts**: The key concepts in genetics are:
- **Heredity**: The transfer of traits from parents to offspring.
- **Variation**: The differences in traits among individuals in a population.

5. **Conclusion**: Genetics primarily deals with both heredity and variations. While mutations (sudden changes in genetic material) are also a part of genetic study, the core focus is on how traits are inherited and how variations arise.

6. **Final Answer**: Therefore, the correct answer to the question "Genetics deals with" is **heredity and variations**.

---