A substance that binds to a protein

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Ligand

Explanation:

and substance that binds to a protein is called a ligand, it comes from the Latin word ligare, which means to bind

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.