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Biology Question 106 – NEET-UG 2025

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Which chromosome in the human genome has the highest number of genes?

Generally, larger chromosomes tend to carry more genes, although gene density can vary.

Step 1: Understand Gene Distribution on Human Chromosomes✦ Active

The number of genes varies significantly across different human chromosomes. Generally, larger chromosomes tend to harbor more genes, while smaller chromosomes have fewer. Chromosome Y is known to have the fewest genes among all human chromosomes.

Step 2: Compare Gene Counts for Given Options○ Expand

Let's consider the approximate gene counts for the given options: - Chromosome X: Contains approximately 800-900 genes. - Chromosome Y: Contains approximately 50-60 genes (the lowest number). - Chromosome 1: Contains over 2000 genes (the highest number). - Chromosome 10: Contains approximately 1300-1400 genes.

💡 Teacher's Secret Hint

Remember that Chromosome 1 is the largest human chromosome.

Step 3: Identify the Chromosome with the Highest Gene Count○ Expand

Based on the comparison, Chromosome 1 has the highest number of genes among the options provided and indeed in the entire human genome.

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