The completed sequence of the human genome was published in 2003. The Human Genome Project consortium announced the essentially complete reference sequence (92% coverage, <400 gaps) on April 14, 2003, in Nature, fulfilling the goal two years ahead of schedule after draft publications in 2000-2001.

Option Analysis

• (1) 2020: Incorrect—refers to ongoing reference improvements (GRCh38), not original HGP completion.

• (2) 2003: Correct—HGP final sequence publication marked completion of euchromatic regions with 99.99% accuracy.​

• (3) 2006: Wrong—last chromosome sequence finished, but main project declared complete in 2003.

• (4) 2010: Incorrect—no major HGP milestone; incremental assembly updates occurred.​

Answer: (2) 2003.​

Introduction to Human Genome Sequencing

The completed sequence of the human genome was published in 2003 by the International Human Genome Project consortium, achieving 92% coverage of euchromatin with 99.99% accuracy. This landmark followed draft announcements (2000) and working drafts (2001).​

HGP Timeline Key Dates

• 1990: Project officially launched

• June 2000: Working draft announced (White House)

• Feb 2001: Nature/Science publications (~90% coverage)

• April 14, 2003: Completion declared (99% euchromatin)

• 2022: T2T consortium filled final 8% gaps (complete)​

Why 2003 Marks Completion

Covered all gene-rich regions; heterochromatin gaps (centromeres, telomeres) technically challenging with 2003 Sanger tech. Modern long-read sequencing (PacBio, Oxford Nanopore) enabled 2022 gapless assembly.​

GATE Genomics Relevance

Tests HGP milestones: 2003 = completion, 2000 = draft. Essential for population genomics, personalized medicine, GWAS question context.​