Explain why the majority of genes in an organism occur in pairs.

Most living organisms keep their genes in their DNA. When alterations occur on the DNA or alterations are met during the formation of DNA strands, it is common that diseases close or related to the structure of genes is why.

b c a d mark me

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a