Question

how many genes make up the human genome?
o four: adenine, thymine, guanine, and cytosine
o 23 pairs of genes
o 20,000–25,000 genes
o 3 billion genes

Explanation:

Adenine, thymine, guanine, and cytosine are nucleotides, not the number of genes. Humans have 23 pairs of chromosomes, not genes. The human genome is estimated to have 20,000 - 25,000 protein - coding genes, not 3 billion.

Answer:

C. 20,000–25,000 genes