Question 1 • WI-Grade 8 Life Science A
The human genetic code can help researchers understand how genes affect health, which supports the development of effective medications and helps explain genetic diseases. Humans have about 19,000 protein-coding genes, so “composed of about 19,000 genes” is also correct. Humans typically have 23 pairs of chromosomes in their body cells, not 23 chromosomes total, and genetic information can be useful beyond understanding human genetics alone.
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