D C
А
Lab Data
Х
Long wings light
brown body
Long wings
ebony body
Short wings light
brown body
Short wings
ebony body
Predicted ratio of LI
Bb X LIBb cross
Number of offspring
Observed phenotypic
ratio
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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 sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.