Question 1

True or false: Human genome sequencing can be done using a simple cheek swab sent through the mail.

Accepted Answer

False. Cheek swabs provide DNA for genotyping (e.g., 23andMe), not full genome sequencing, which requires specialized lab equipment.

Question 2

True or false: Every human shares about 99.9% of their DNA, meaning only 0.1% accounts for all individual differences.

Accepted Answer

True. This 0.1% includes SNPs, copy number variations, and structural variants that drive diversity.

Question 3

True or false: The cost of sequencing a human genome has dropped from $3 billion in 2003 to under $1,000 today.

Accepted Answer

True. Technological leaps like next-generation sequencing slashed costs; now clinical whole-genome sequencing can cost ~$600–$1,000.

Question 4

True or false: Your genome sequence is completely unique—no two people on Earth have ever shared the exact same DNA sequence.

Accepted Answer

False. Identical twins share nearly identical sequences; also, many non-coding regions are highly conserved across humans.

Question 5

True or false: Only about 2% of the human genome actually codes for proteins; the rest is often called 'junk DNA'.

Accepted Answer

True. Protein-coding exons make up ~1.5% of DNA; the rest includes regulatory elements, introns, and non-coding RNAs.

Question 6

True or false: Human genome sequencing can reveal your exact risk for developing Alzheimer's disease years before symptoms appear.

Accepted Answer

False. While APOE variants increase risk, sequencing cannot predict Alzheimer's with certainty due to complex environmental and genetic factors.

Question 7

True or false: Scientists have sequenced the entire human genome from a single cell.

Accepted Answer

False. Single-cell genome sequencing exists but is error-prone and incomplete; most human genome assemblies require millions of cells.

Question 8

True or false: The Human Genome Project was completed in 2003, but 8% of the genome remained unsequenced until 2022.

Accepted Answer

True. The 'finished' 2003 draft missed heterochromatic regions, fully sequenced only in 2022 by the Telomere-to-Telomere consortium.

Human genome sequencing Trivia Questions