Light micrograph of Paramecium protozoans around an air bubble (left). Most are paired & undergoing conjugation,a type of sexual reproduction. The ciliates possess two different types of nucleus; a small diploid micronucleus & a larger polyploid macronucleus. During conjugation the cytoplasm of the two conjugants fuses,the macronuclei disintegrate and the micronuclei undergo meiotic division. The haploid products of this division are exchanged & a zygote nucleus is formed in both conjugants. New macronuclei are then formed by mitotic division of the genetic material of the new micronuclei. Magnification: x100 at 35mm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nuridsany, Claude / Perennou, Maria |
Bildgröße: | 3510 px × 5079 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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