Answer:
The correct answer is C) the discovery that humans have approximately 20,000 genes—far fewer than expected.
Step-by-step explanation:
The human genome project was started in 1990 and completed in 2003 to identify all the DNA sequences and genes human body is made up of and to map all the genes present in the human body.
The great achievements of this project were identification of more the 20 thousand genes, the discovery of genetic and physical map, Identification of DNA sequence present in genes with 99.99 % accuracy.
The human genome project is useful in the identification of genes related to genetic disease and helpful in curing these diseases by gene therapy and drug design.
So, the correct answer is C) the discovery that humans have approximately 20,000 genes—far fewer than expected.