Question

The human chromosome with the highest and least number of genes in them are respectively [NCERT Exemplar]
(a) Chromosome 21 and Y
(b) Chromosome 1 and X
(c) Chromosome 1 and Y
(d) Chromosome X and Y

Answer 1

Answer:- Chromosome 1 and Y

explaination:-

Chromosome 1 is the largest human chromosome, spanning about 249 million DNA building blocks (base pairs) and representing approximately 8 percent of the total DNA in cells.

Identifying genes on each chromosome is an active area of genetic research.

From the insights of the sequencing of the human genome, it is estimated that chromosome 1 which is the largest human chromosome has the maximum number of genes (around 3168 genes), while chromosome Y has the least number of genes (around 344 genes).

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