A good reason for why tobacco smoke is considered a carcinogen is because it causes mutations leading to cancer.
The parents are heterozygotes (Aa) meaning that they carry the disease but do not themselves have it. If both parents are carriers, their child can inherit (aa) giving them the disease.
Chlorine has a higher electronegativity than hydrogen, but the chlorine atom's attraction for electrons is not sufficient to remove an electron from hydrogen. Consequently, the bonding electrons in hydrogen chloride are shared unequally in a polar covalent bond.
Um there is no picture. I would love to help you though