Centrioles are the cylindrical, rod-shaped, and microtubular structures that are present in the eukaryotic cells. They are located near the nucleus of the cell. They do not have a limiting membrane as well as DNA and RNA. The centrioles exist in the cells of algae, mosses, ferns, and animals but are absent in the prokaryotic cells and in the cells of flowering plants.
These centrioles are responsible for giving rise to the spindle fibers during the processes of mitosis and meiosis and hence the spindle fibers are known to be the mitotic apparatus. In the case of flagellated and ciliated cells, these spindle fibers are arranged just beneath the cell membrane.
Meiotic nondisjunction is much more likely than mitotic nondisjunction. Based on
A woman who is heterozygous, Bb, has brown eyes;
Explain why familial breast cancer shows a dominant pattern of inheritance in
How is an F′ factor different from an F factor?
With regard to the timing of conjugation, explain why the recipient
The raw material for evolution is random mutation. Discuss whether or
Why is an antibody used in this experiment? From
Explain the type of speciation (allopatric, parapatric, or sympatric
In fruit flies, curved wings are recessive to straight wings,
A recessive allele in mice results in an unusally long neck.
