They most likely uses a sample and a microscope to see.
Introns, and Exons are the correct answer
I believe it is more related species
<span>Chromosome 14 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 14 spans about 107 million base pairs (the building material of DNA) and represents between 3 and 3.5% of the total DNA in cells.</span><span>
*Brainliest answer if possible</span>
