Blastomere | biology | Britannica
These early divisions produce separate cells called blastomeres. The first few cleavages occur simultaneously in all of the blastomeres (cells), but, as the number of cells increases, simultaneity is lost, and the blastomeres divide independently. …
43.5B: Cleavage, the Blastula Stage, and Gastrulation
2023年10月31日 · Each cell within the blastula is called a blastomere. Cleavage can take place in two ways: holoblastic (total) cleavage or meroblastic (partial) cleavage. The type of cleavage depends on the amount of yolk in the eggs.
The first two blastomeres contribute unequally to the human …
2024年5月23日 · We discovered that the majority of cells in the EPI, the future human body, originate from one of the two cells in most embryos. Notably, the first blastomere to divide at the 2-cell stage has a higher likelihood to generate the …
Blastomere - FertilitySmarts
A blastomere is a cell that is created in the early stages of division in a fertilized egg. These divisions are called cleavage divisions, and the cells created by each cleavage-stage are called blastomeres.
Blastomere - (General Biology I) - Vocab, Definition ... - Fiveable
Definition. A blastomere is a cell that results from the division of a fertilized egg during early embryonic development. These cells are produced through a process called cleavage, which occurs after fertilization, leading to the formation of a multicellular embryo.
Embryonic Development, Cell Division & Gastrulation - Britannica
Blastula, hollow sphere of cells, or blastomeres, produced during the development of an embryo by repeated cleavage of a fertilized egg.
An Introduction to Early Developmental Processes
Cleavage. After fertilization, the development of a multicellular organism proceeds by a process called cleavage, a series of mitotic divisions whereby the enormous volume of egg cytoplasm is divided into numerous smaller, nucleated cells. These cleavage-stage cells …
Developmental capacity is unevenly distributed among single …
2021年11月2日 · During preimplantation development, mammalian embryo cells (blastomeres) cleave, gradually losing their potencies and differentiating into three primary cell lineages: epiblast (EPI),...
Molecular basis of the first cell fate determination in mouse ...
2010年7月13日 · Up to the eight-cell embryo stage, the blastomeres are morphologically identical and distributed symmetrically in the mammalian embryo. Functionally, in some species, they are all totipotent.
Dynamic blastomere behaviour reflects human embryo ploidy …
2012年12月4日 · Here we combine non-invasive time-lapse imaging with karyotypic reconstruction of all blastomeres in four-cell human embryos to address the hypothesis that blastomere behaviour may reflect...
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