A factor (allele) that covers up another factor is A. dominant

B. recessive

C. obsessive

D. combinant

dominant

Explanation:

a dominant allele will express over a recessive allele where a combinant allele would express along with another allele

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.