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wk 6 related stuffs

wk 6 related stuffs

Q a. Number of divisions Mitosis is a simple cell division, ending up with two identical cells, each with both pairs of every gene. Meiosis is a cell division for gametes. b. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells. c. Mitosis is used to produce daughter cells that are genetically identical to the parent cells. d. The four daughter cells resulting from meiosis are haploid and genetically distinct. The daughter cells resulting from mitosis are diploid and identical to the parent cell. e. Four daughter cells in meiosis and two daughter cells in mitosis. What are autosomal linked traits? Give examples.f. Differentiate between mitosis and meisis.

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Some characteristics of proto oncogenes are: • Self-sufficiency in growth signals. • Insensitivity to anti-growth signals. • Evading programmed cell death. • Limitless replicative potential. • Sustained angiogenesis. • Tissue invasion and metastasis. Proto-oncogenes are genes that normally help cells grow. When a proto-oncogene mutates or there are too many copies of it, it becomes a "bad" gene that can become permanently turned on or activated when it is not supposed to be. When this happens, the cell grows out of control, which can lead to cancer.