NEET BIOLOGY

Detailed explanation-1: -Correct answer: (A) Explanation: Human Genome Project was a mega project launched in the year 1990 that aimed to sequence all 3×109 base pairs in the human genome. Chromosome 1 has most genes (2968) hence it was the last human chromosome to be completely sequenced.

Detailed explanation-2: -Amongst them, chromosome 1 is the largest chromosome and has the most number of genes, that is, 2968 genes. It was the last human chromosome to be sequenced completely in the Human Genome Project in 2006.

Detailed explanation-3: -Complete answer: Chromosome 1 was the last human chromosome to be completely sequenced and was completed in May 2006. it was the last human chromosome among the 24 chromosomes and 22 autosomes and X and Y to be sequenced.

Detailed explanation-4: -The sequence of the first human chromosome to be decoded has been announced this week, with the publication in Nature of the DNA sequence for chromosome 22.

Detailed explanation-5: -The final, complete human genome sequence was described in a set of six papers in the April 1, 2022, issue of Science. Companion papers were also published in several other journals. The work was done by the Telomere to Telomere (T2T) consortium.