Cells of every adult multicellular organism trace their ancestry to thezygote, the first cell of a new individual that is formed by union of sperm and egg. During development, cells undergo repeated mitosis and division and ultimately differentiate into specialized cells that have structures and func...
Egg and sperm cells are produced by a special type of nuclear division called meiosis in which the number of chromosomes is halved. Division of the cytoplasm is called cytokinesis. Somatic cells reproduce by mitosis, which results in two cells identical to the one parent cell. Interphase is ...
The cell body is the same as soma and it belongs to the area of the neuron that includes the nucleus. The soma also called as somas or somata is... Learn more about this topic: Types of Neurons | Afferent, Efferent & Others
Gametes are produced by mitosis of the gametophyte, which then fuse to form the embryo. This cycle is called alternation of generations. Meiosis involves two divisions. During meiosis I, homologous chromosomes cross over, exchanging segments. By the end of telophase I the members of homologous ...
centromere,kinetochore- a specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape; "the centromere is difficult to sequence" aster- star-shaped structure formed in the cytoplasm of a cell having fibers like rays that su...
4b,c). While bik1Δ and Kar9 triple-interface mutations separately had no or little effect on the outcome of mitosis at 25 °C, their combination caused the accumulation of late-anaphase cells with elongated spindles that remained in the mother cell and failed to segregate an SPB to the...
Understand the cell cycle phases. See descriptions of each stage of mitosis and understand what happens during interphase. Learn the importance of cell division. Related to this Question Using a cell from your body as an example, explain the stages in cell cycle. ...
Cells in mitosis show the greatest radiosensitivity, which might relate to the highly condensed state of the DNA, limiting access by DNA repair enzymes to the damaged sites. Cell cycle delays from irradiation at earlier cell cycle stages (G1, S, and early G2) would allow more time for ...
the nuclei of some specialized cells, especially polyploid cells, may divide by simple amitosis. Highly polyploid nuclei may divide not only into two but into many parts, and they can also divide by budding. This may result in the division of whole chromosome sets, or the segregation of geno...
Germ cells express Fas, a transmembrane receptor protein that, when bound by Fas ligand (FasL) secreted by the Sertoli cell, transmits an apoptotic signal within the cell. All chemically induced germ cell death investigated so far also appears to occur through the process of apoptosis (Figure ...