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:

The human genome is estimated to contain 20,000 - 25,000 protein - coding genes. Adenine, thymine, guanine, and cytosine are nucleotides, not the number of genes. There are 23 pairs of chromosomes, not genes. And 3 billion refers to the number of base pairs in the human genome, not genes.

Answer:

20,000–25,000 genes