Besides fossils, the common ancestry of great apes and man is shown by nearly similar

Options

A. chromosome numer
B. DNA content
C. banding pattern of chromosomes
D. all the above

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks for evidence, besides fossils, that supports the common ancestry of great apes and humans.

2. **Identifying Great Apes**: Great apes include species such as gorillas, chimpanzees, and orangutans. Recognizing these species is crucial for understanding the similarities with humans.

3. **Chromosomal Comparison**: It is known that great apes have 48 chromosomes in their somatic cells, while humans have 46 chromosomes. This difference indicates a close genetic relationship.

4. **DNA Content Analysis**: The total DNA content between humans and great apes is nearly similar. This similarity in DNA content suggests a shared evolutionary background.

5. **Banded Chromosome Patterns**: A comparative study of the banding patterns of chromosomes between humans and great apes shows that they are very similar. Specifically, chromosomes 3 and 6 in humans have corresponding chromosomes in great apes that exhibit almost identical banding patterns.

6. **Conclusion**: The similarities in chromosome number, DNA content, and banding patterns provide strong evidence for the common ancestry of great apes and humans.

### Final Answer
The common ancestry of great apes and man is shown by nearly similar **chromosomal structures and DNA content**.