The source of most variations come from

The random genetic combinations during chromosome crossover during meiosis

The sources of genetic variations is mutation

Various mutations are the ultimate source of genetic variations. Mutations are likely to be rare and most mutations are neutral or deleterious. There are several sources of variations but the two main sources of genetic variation are mutations and re combinations of genes which takes place as a result of sexual reproduction. A mutation is a permanent change in the DNA within a gene.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

all answers true and false

explanation: