After a spermatozoon penetrates an ovum,its nucleus decondenses and protamines are lost from the chromosomes.The protamines will be replaced by ____________.

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Histones are proteins that package and organize the DNA in eukaryotic cells, including in the nucleus of the fertilized ovum. The protamines, which are smaller and more basic than histones, were used to compact and protect the DNA in the sperm cell's nucleus. After fertilization, the protamines are replaced by histones to allow for DNA replication, transcription, and other cellular processes that depend on this organized structure. Phospholipids and hyaluronic acid are not involved in this process, and acrosin is an enzyme found in sperm that helps it penetrate the outer layers of the ovum.

After a Spermatozoon Penetrates an Ovum,its Nucleus Decondenses and Protamines