Question 1

True or false: The cost of sequencing a human genome dropped from $3 billion in 2003 to under $1,000 by 2020.

Accepted Answer

True. Advancements in next-generation sequencing dramatically reduced costs; by 2020, sequencing a human genome cost under $1,000, with some clinical services charging ~$600–$1,000.

Question 2

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

Accepted Answer

True. Direct-to-consumer companies like Nebula Genomics and Dante Labs offer whole genome sequencing via mail-in cheek swab kits.

Question 3

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

Accepted Answer

True. The 0.1% of DNA variation between individuals includes SNPs, insertions, deletions, and copy number variations, which underlie all genetic diversity.

Question 4

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

Accepted Answer

False. Identical twins originate from a single fertilized egg and share the same DNA sequence, so the statement is false.

Question 7

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.

Question 8

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.

Human genome sequencing Trivia Questions