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Cleavage - Development Biology
Cleavage or segmentation is a series of cell divisions of the fertilized .egg through which it is converted into a multicellular structure, called blastula. The main characteristics of cleavage include:
The cell divisions in the somatic cells are mitotic. The daughter cells or blastomeres or cleavage cells are also derived as a result of mitotic divisions of the zygote. We may ask whether there are any differences between mitotic divisions of somatic cells and, of the zygote and the blastomeres derived from it during cleavage.
Figure shows part of a DNA molecule (a) (i) What do the dotted lines in Figure represent? (ii) Name J to M. J.............................. K..............................
Q. Nematode identity card. How are nematodes characterized according to examples of representing beings, type of symmetry basic morphology, , germ layers and coelom, digestive syst
What is life?
Explain Poor growth - clinical signs of kwashiorkor? Growth retardation is the earliest manifestation of kwashiorkor, the child will be lighter and shorter than its normal peer
Endocrine glands
Class of Crustacea - Ostracoda Generally called mussel or seed-shrimps, Ostracoda include both fresh water and marine forms. The small crustaceans, computing a few mm have the
What are gene interactions? What are the three main types of gene interactions? The Gene interaction is the phenomenon in which a given phenotypical trait is conditioned by two
Cytosketal Mechanism There are two co-ordinate processes in the cleavage (or cell division) that is displayed in Figure. Karyokinesis The mitotic division of nucleus
Explain the basic Concept of Energy? Energy in simple terms may be defined as the ability, or power, to do work. As a student of dietetics and nutrition, you already know that
In genetic recombination by crossing over what is the difference between parental gametes and recombinant gametes? Parental gametes are those gametes that keep the original lin
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