Question

Experiments on Acetabularia by Hammerling proved the role of

• A. Cytoplasm in controlling differentiation
• B. Nucleus in heredity
• C. Chromosomes in heredity
• D. Nucleo-cytoplasmic ratio

Answer 1

Answer: (B)

Nucleus in heredity

• Acetabularia cell is composed of three segments: the "rhizoid" or base which contains the nucleus, the "stalk," and the "cap."
  
• In his experiments, Hammerling grafted the stalk of one species of Acetabularia onto the rhizoid of another species. In all cases, the cap that eventually developed on the grafted cell matched the species of the rhizoid rather than that of the stalk.
  
• This experiment shows that the base is responsible for the type of cap that grows. The nucleus that contains genetic information is in the base, so the nucleus directs cellular development and controls heredity.

So, the correct option is 'Nucleus in heredity'.