The right answer is a person has more than two alleles for a certain trait.
Duplication is a genetic mutation characterized by the doubling of genetic material on a chromosome. There are several mechanisms that result in the duplication of either a large chromosomal portion, a gene, or a nucleotide sequence.
I don't see your article, but one pollutant, CFC, is used in refrigerators and aerosols. Please mark Brainliest!!!
Active deffusion.. this way the water is retained and the unnecessary salts ions are expelled out.
B, burrowing action of earthworm
