In a process of meiosis a sing cell divides twice to produce four daughter cells which contains half the amount of. genetic information These cells are sex cells. These four daughter cells consists of half the number of chromosomes of the parent so they are haploid. This is the reason in maple tree the chromosome decreased from 52 to 26.
It’s possible the other 90% was excreted ? Because a lot of the energy may not be useful to the mouse’s system. ... hmmm. That’s all I could think of, sorry I can’t be a better help ;w;