Question

Which was the last of the 24 human chromosomes to be completely sequenced?

• A. Chromosome – 1
• B. Chromosome – 11
• C. Chromosome – 21
• D. Chromosome – X

Hint:

Chromosome 1 sequencing was challenging due to its large size and complexity, as it carries the most genes among all human chromosomes.

Answer 1

The Correct Option is A

Step 1: Recall the Human Genome Project.
Due to its substantial size and intricate nature, Chromosome 1 was the final human chromosome to achieve complete sequencing. Its complexity arises from housing the most genes and a significant proportion of repetitive sequences, which presented considerable challenges during the sequencing process.
Final Answer: The final chromosome to be fully sequenced was Chromosome 1.