In my opinion this is not fact, but everything in the world has similar D.N.A with each other so it doesn't say much about them. That being said fact is they must have had a common ancestor. I hope this helps.
It’s very very unlikely for the mother to catch it again as once you’ve caught it you are immune to the virus
Gas produced and new substances formed. there’s no light or sound produced, no heat changed, and no precipitation.
Answer:
More Valence electrons add mass to the atom, making it less reactive