Podcast
Questions and Answers
Quel est le rôle de la vitelline dans la division cellulaire?
Quel est le rôle de la vitelline dans la division cellulaire?
Comment les œufs sont-ils classés en fonction de la quantité et de la distribution de vitellus?
Comment les œufs sont-ils classés en fonction de la quantité et de la distribution de vitellus?
Comment les œufs holoblastiques et méroblastiques diffèrent-ils en termes de segmentation?
Comment les œufs holoblastiques et méroblastiques diffèrent-ils en termes de segmentation?
Study Notes
- Vitellus slows down cell division by interfering with the formation of division furrows and mitotic spindles.
- The location and segregation of vitellus determine the possible location of mitotic spindles and the relative size of blastomeres.
- Eggs can be classified as alécithe, oligolécithe, or hétérolécithe based on the amount and distribution of vitellus.
- Alécithe and oligolécithe eggs have equal segmentation and blastomeres of similar size.
- Hétérolécithe eggs have unequal segmentation due to a vitelline gradient from animal to vegetative pole, resulting in larger macromeres and fewer mesomeres.
- Télolécithe and centrolécithe eggs have partial segmentation that only affects the cytoplasmic area without vitellus.
- Eggs can be holoblastic or méroblastique based on the extent of segmentation.
- Holoblastic eggs have complete segmentation and divide equally.
- Méroblastique eggs have partial segmentation and divide unequally.
- The type and distribution of vitellus play a crucial role in determining the size and distribution of blastomeres during cell division.
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Description
Test your knowledge on the role of vitellus in cell division and the classification of eggs based on their vitelline content. This quiz covers topics such as the interference of vitellus with division furrows and mitotic spindles, the location and segregation of vitellus, and the resulting size and distribution of blastomeres. You'll also learn about the different types of eggs based on their amount and distribution of vitellus, and how they affect segmentation and blastomere size