Question

question 1 of 25
what did oswald avery discover that changed scientists understanding of
how traits are inherited?
a. heritable information is carried by dna and not by proteins or
rna.
b. a transforming principle found in cells can be inherited and
passed to offspring.
c. dominant alleles may mask recessive alleles in offspring.
d. parents pass on factors that produce specific traits in offspring.

Explanation:

Oswald Avery's experiments showed that DNA, not proteins or RNA, was the molecule responsible for carrying genetic information. This was a major breakthrough as it changed the understanding of how traits are inherited. Previously, proteins were thought to be the carriers of genetic information. Avery's work was crucial in establishing DNA as the hereditary material.

Answer:

A. Heritable information is carried by DNA and not by proteins or RNA.