(BIOLOGY) - NEED HELP WITH THESE QUESTIONS! What is G_0 (gap zero phase in cell
ID: 166102 • Letter: #
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(BIOLOGY) - NEED HELP WITH THESE QUESTIONS!
What is G_0 (gap zero phase in cell cycle) and under what kinds of conditions is it evident? Does cell differentiation coincide with G_0? Are DNA synthesis, RNA synthesis, protein synthesis evident during G_0? In normal human mitosis, how many chromosomes are there at the spindle equator at metaphase? ...how many chromatids are there at the spindle equator at metaphase? How many chromosomes are at each spindle pole at the completion of mitosis? How does bilateral symmetry (mirror-image nature) of sister chromatids figure into successful mitosis, i.e. proper spindle attachments and proper anaphase segregation? When in the cell cycle (G_1, G_2, M, S) are spindle fiber attachments evident?...at which stage (G_1, G_2, M, S) is anaphase segregation evident? How does bilateral symmetry of the mitotic spindle figure into successful mitosis? Explain how chromosome replication followed by the two-step segregation plan of meiosis ensures making haploid gametic karyotypes from diploid progenitors. How do Mendel's First Law of segregation and Second Law of independent assortment relate to generating haploid from diploid? Explain how independent assortment generates so many (i.e. 2 to the nth power-2^n) combinations of maternally-derived and paternally-derived chromosomes via chromosome segregation in meiosis. In the above, what does superscript 'n' stand for?Explanation / Answer
Answer1] = Go phase or gap zero phase =it is period in cell cycle in which cells exist in an inactive , noncycling state
or quiescent state
cell differention does not coincide with Go phase because Go phase is quiescent phase where cell ceases its cell cycle metabolic machinery & comes to halt whereas its other specialised functions are continued
Skeletal muscle & neuron muscle terminally differentiated in Go phase
DNA synthesis , RNA synthesis ,protein synthesis does not evident with the Go phase
because it is resting state
all processes takes place in S phase not in Go phase
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