Genic balance of sex determination was proposed by

Options

A. Bridges
B. Mendel
C. Balbiani
D. Morgan

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the scientist who proposed the genic balance theory of sex determination.

2. **Identifying the Options**: The options provided are:
- A) Bridges
- B) Mendel
- C) Balbiani
- D) Morgan

3. **Analyzing Each Option**:
- **Option A: Bridges** - This scientist is known for proposing the genic balance theory of sex determination.
- **Option B: Mendel** - Known as the father of genetics, he worked on pea plants and established the laws of inheritance.
- **Option C: Balbiani** - Associated with giant chromosomes known as Balbiani chromosomes.
- **Option D: Morgan** - Known for his work with Drosophila (fruit flies) and is often referred to as the "fly man" of genetics.

4. **Determining the Correct Answer**: Since Bridges is the one associated with the genic balance theory, the correct answer is **Option A: Bridges**.

5. **Conclusion**: The genic balance theory of sex determination was proposed by Bridges.

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