"Every cell of the body contributes gemmules to the germ cells and so shares in the transmission of inherited characters" This theory is known as

Options

A. Mutations theory
B. Germplasm theory
C. Pangenesis theory
D. Inheritance of acquired characters

Answer

To answer the question, "Every cell of the body contributes gemmules to the germ cells and so shares in the transmission of inherited characters," we need to identify the correct theory that describes this concept.

### Step-by-Step Solution:

1. **Understanding the Question**: The question refers to a theory where every cell in the body contributes to the germ cells through the production of gemmules, which are believed to carry inherited traits.

2. **Analyzing the Options**:
- **Mutation Theory**: This theory suggests that new species arise from sudden changes in traits. It does not involve gemmules or the contribution of body cells to germ cells.
- **Germplasm Theory**: Proposed by August Weismann, this theory states that inheritance only occurs through germ cells, meaning somatic cells do not contribute to inheritance. This contradicts the idea presented in the question.
- **Pangenesis Theory**: This theory, proposed by Charles Darwin, posits that all somatic cells produce tiny particles called gemmules (or pangenes) that carry both parental and acquired characteristics. These gemmules are thought to be transmitted to the germ cells and thus influence the offspring.
- **Inheritance of Acquired Characters**: This theory suggests that traits acquired during an individual's lifetime can be inherited by offspring, but it does not specifically mention gemmules.

3. **Identifying the Correct Answer**: Based on the analysis, the theory that aligns with the statement in the question is the **Pangenesis Theory**. This theory explicitly states that somatic cells contribute gemmules to germ cells, which then participate in the transmission of inherited traits.

### Final Answer:
The theory is known as **Pangenesis Theory**.