The backbone of the double helix has an alternating molecules. what do you call these alternating molecule?

This backbone is composed of alternatingsugar and phosphate groups, and defines directionality of the molecule. Thesebonds are called phosphodiester bonds, and the sugar-phosphate backbone is described as extending, or growing, in the 5' to 3' direction when the molecule is synthesized.

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

hope this : )

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.