Question

which discovery did scientists make after many years of scientific research on heredity?
a. proteins are the source of inherited information
b. the information that codes for traits is carried by dna.
c. inherited information is passed between parents and offspring by rna.
d. genes are coded on proteins that are passed down over generations.

Explanation:

After decades of research on heredity (including experiments like Griffith's transformation experiment, Avery-MacLeod-McCarty experiment, and Hershey-Chase experiment), scientists confirmed that DNA, not proteins or RNA, is the molecule that carries genetic information coding for inherited traits. Options A, C, and D are incorrect because proteins do not store inherited information, RNA is not the primary hereditary molecule passed between parents and offspring, and genes are coded on DNA, not proteins.

Answer:

B. The information that codes for traits is carried by DNA.