Because it can analyze of what we are made of and who were our ancestors by studying our DNA
Answer:
46 chromosomes
Explanation:
Chromosomes form after DNA replicates; prior to replication, DNA exists as chromatin. Chromosomes contain genes, which code for proteins. Human cells normally have 46 chromosomes, made up of two sets of chromosomes, one set inherited from each parent.
Sorry it would not let me nothing else