Question

Select the incorrect statement:

• A. Chromosome 1 has the most genes and chromosome Y has the fewest.
• B. Chromosome 21 has the most genes and chromosome Y has the fewest.
• C. Less than 2 percent of the genome codes for proteins.
• D. The functions of over 50 percent of discovered genes are unknown.

Answer 1

The Correct Option is B

Chromosome 1 contains the most genes, whereas chromosome Y has the fewest. Chromosome 21 has one of the fewest gene counts among human chromosomes. The statement that chromosome 21 has the most genes is incorrect.

Answer 2

• Chromosome 1 has the most genes, not Chromosome 21. Chromosome 1 contains approximately 2,000 to 2,500 genes, making it the largest and most gene-rich chromosome.
• Chromosome Y indeed has the fewest genes among the chromosomes. It has about 50 to 200 functional genes, significantly fewer than the other chromosomes.
• Less than 2 percent of the genome codes for proteins is correct. The human genome consists of a large amount of non-coding DNA.
• The functions of over 50 percent of discovered genes are unknown is also true. Many genes have been discovered, but their precise roles in the body are still unclear.