Three billion pairs of DNA (deoxyribonucleic acid) molecules are found:
a. in the human body.
b. in the chromosomes of each human cell.
c. in the X chromosome of a cell.
d. in each pair of chromosomes in the nucleus of a cell.
Question 2
The color of our hair and eyes is determined by our:
a. chromosomes.
b. genes.
c. cytoplasm.
d. chorions.