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19.1.4: Volvox

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    alt
    Figura 19.1.4.1: Volvox es un género de algas verdes multicelulares. por http://www.mikro-foto.de (CC-SA-BY Frank Fox)

    Reproducción Volvox

    Volvox puede reproducirse tanto asexualmente como sexualmente. En la reproducción asexual, los gonidios se convierten en nuevos organismos que se desprenden del progenitor (que luego muere). En la reproducción sexual, la presencia de causas químicas inductoras

    • Los gonidios de los machos se convierten en racimos de espermatozoides.
    • Los gonidios de las hembras se desarrollan en nuevas esferas cada una de cuya gonidia propia se desarrolla en un par de huevos.
    • Los espermatozoides salen del progenitor masculino y nadan hasta la hembra donde fertilizan sus óvulos.
    • Los cigotos forman una etapa de reposo que permite a Volvox sobrevivir a duras condiciones.

    El genoma de Volvox carteri consta de 14,560 genes que codifican proteínas, ¡solo 4 genes más que en el unicelular Chlamydomonas reinhardtii! La mayoría de sus genes también se encuentran en Chlamydomonas. Los pocos que no son codifican las proteínas necesarias para formar la matriz extracelular masiva de Volvox.


    This page titled 19.1.4: Volvox is shared under a CC BY 3.0 license and was authored, remixed, and/or curated by John W. Kimball via source content that was edited to the style and standards of the LibreTexts platform.