Correct me if I’m wrong but I was under the impression that the scientific community supports the biblical story through DNA analysis and human genome experiments that all of mankind is descendant from two human parents
The biblical story says that all of humankind is descended
solely from two persons, and that these two persons were the first humans to exist.
The scientific evidence does not say that. The scientific evidence says that we can locate a female who is the
most recent female ancestor (MRFA) of all presently living humans. But this MRFA was not the first human female: she herself had a mother, and her mother had a mother, etc. MRFA was not the only human female existing: she likely had sisters, cousins, aunts, etc.
One way to think about the MRFA is to think about your own mother. Your mother is the MRFA for you and your siblings. Your grandmother is the MRFA for you, your siblings, and your cousins. If you, your sibilngs, and your cousins were the only humans alive, then your grandmother would be the MRFA of all humanity – and yet, you know that your grandmother herself had a mother. This great-grandmother would be a recent female ancestor, but not the
most recent female ancestor.
Likewise, the mitochondrial Eve is the MRFA for all currently living humans, but she is not the
only female ancestor of all currently living humans. There were females before her, and existing simultaneously with her.
Similar logic applies to the Y-chromosomal Adam, the most recent male ancestor (who did not live, according to the evidence, at the same time that m-Eve lived).