A student examines a thin section of an onion-root tip and records the number of cells that are in each stage of the cell cycle. She observes 94 cells in interphase, 14 cells in prophase, 3 cells in prometaphase, 3 cells in metaphase, 5 cells in anaphase, and 1 cell in telophase. If the complete cell cycle in an onion-root tip requires 22 hours, what is the average duration of each stage in the cycle? Assume that all cells are in the active cell cycle (not G0).
Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
A student examines a thin section of an onion-root tip and records the
number of cells that are in each stage of the cell cycle. She observes 94 cells
in interphase, 14 cells in prophase, 3 cells in prometaphase, 3 cells in
metaphase, 5 cells in anaphase, and 1 cell in telophase. If the complete cell
cycle in an onion-root tip requires 22 hours, what is the average duration of
each stage in the cycle? Assume that all cells are in the active cell cycle (not
G0).
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