What is the answer im not sure

Draw the structure of dna nucleotide with adenine as nitrogenous base

Gregor mendel is best known for his work with pea plants and for uncover many of the mysteries of genetics. one of his major findings stated that there were specific, physical units of inheritance that are transmitted during reproduction. what is the the name given to these units of inheritance which can be found on chromosomes? a) centromeres b) cytoplasm c) genes d) nucleotides

All ova contain sex chromosomes corresponding to: x y xx xy