LA PRIMERA MITOSIS EMBRIONARIA EMPLEA DOS HUSOS ACROMÁTICOS

La primera división celular de los embriones de mamíferos se produce mediante dos husos acromáticos (haces de microtúbulos) y no uno como se pensaba. Por ello, los cromosomas maternos y paternos permanecen separados.

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Parental chromosomes kept apart during embryo's first division: Scientists show that mammalian life begins differently than we thought -- ScienceDaily: 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.