Chromosomal theory of inheritance was proposed by:

Options

A. Bateson and Punnet
B. T.H. Morgan
C. Watson and Crick
D. Sutton and Boveri

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the scientists who proposed the chromosomal theory of inheritance.

2. **Identifying the Options**: The options given are:
- A) Batson and Punnett
- B) T. H. Morgan
- C) Watson and Crick
- D) Sutton and Boveri

3. **Historical Context**: The chromosomal theory of inheritance was not known during the time of Gregor Mendel and Charles Darwin. This theory emerged later, around the early 20th century.

4. **Key Contributors**: The chromosomal theory of inheritance was proposed by two scientists:
- Walter Sutton
- Theodor Boveri

5. **Year of Proposal**: This theory was credited to Walter Sutton's work in the years 1902 and 1903. Theodor Boveri worked independently around the same time.

6. **Theory Explanation**: The chromosomal theory of inheritance states that:
- Genes are located at specific positions (loci) on chromosomes.
- The behavior of chromosomes during meiosis explains the inheritance patterns described by Mendel.

7. **Conclusion**: Based on the information, the correct answer to the question is D) Sutton and Boveri.

**Final Answer**: The chromosomal theory of inheritance was proposed by Sutton and Boveri.

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