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 genes.
• 23 pairs refer to the number of chromosome pairs in humans, not the number of genes.
• 3 billion is the approximate number of base pairs in the human genome, not genes.
• The human genome is estimated to have 20,000 - 25,000 protein - coding genes.

Answer:

20,000–25,000 genes