What are covalent bonds used to form?

Explanation:

A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pair

in biology it is used and found in DNA and proteins

in DNA they hold together building blocks that make strand of DNA however in protein covalent peptide bond that links amino acid in protein chain

answer; i do believe that the correct answer is; ///mendelian genes are at specific loci on the chromosome and, in turn, segregate during meiosis;