Another 100 points
what type of mutation could cause the 3-nucleotide reading frame of trna to be shifted?

switching a normal nucleotide for an abnormal one

deletion of one or more nucleotides during replication

replacing an amino group

incorrect base pairing

b

Explanation:

deletion of one or more nucleotides during replication

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.