B
Explanation
Sodium Fluoride
Genes are DNA or RNA, they act as instructions to make molecules called proteins! They are found in chromosomes and there main objective is to carry out information that determines your characteristic traits that are inherited from your parents!
Hope that helps :))
Answer: C) Centromeres
Explanation: Centromeres are involved in crossing over, none of the other ones are.
RNA, is ribonucleic<span> acid
DNA, is </span><span>deoxyribonucleic acid</span>
