Why was marie curies research dangerous

Marie Curie, known as the 'mother of modern physics', died from aplastic anaemia, a rare condition linked to high levels of exposure to her famed discoveries, the radioactive elements polonium and radium. ... Her body is also radioactive and was therefore placed in a coffin lined with nearly an inch of lead.

Explanation:

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.