Parental chromosomes kept apart during embryo's first division: Scientists show that mammalian life begins differently than we thoughtwww.sciencedaily.com

It was long thought that during an embryo's first cell division, one spindle is responsible for segregating the embryo's chromosomes into two cells. Scientists now show that there are actually two spindles, one for each set of parental chromosomes, meaning that the genetic information from each parent is kept apart throughout the first division.

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