Biology

6. Meiosis and mitosis describes the process by which cubicles divide,
either by agamous or sexual reproduction to produce a late organism.
Meiosis is a institute of carrell division that produces gametes in humans
these are egg cells and sperms, each with reduced or halved number of
chromosomes. The number of chromosomes is restored when two gametes
fuse together to form a zygote. Meioses produces haploid daughter
cells that are genetically distinct from each other and from the
parent cell. However, mitosis is a form of cell division that produces
daughter cells identical to the parent during repair or growth. Each
cell contains the same genetic code as the parent cell, it is able to
do this because it has copied its own chromosomes preceding to cell
division. Meiosis consists of two divisions whilst mitosis is followed
in one division.

7.



four strains: Prophase, Metaphase, Anaphase and Telophase

Prophase: nuclear envelope disintegrates, centrioles (microtubules) begin to form on both ends of the cell, and spindle fibers forming

Metaphase: (Meta = middle) spindle fibers attach to centromere (centromere --> holds the sister chromatids together), chromosomes cable up in the MIDDLE (connected to spindle fibers)

Anaphase: (Ana --> away) The spindle fibers take up the sister chromatids apart and AWAY from eachother to opposite ends of the cell.

Telophase: Nuclear envelope begins re-forming. Spindle fibers disappear, cell ready to separate into daughter cells.

8. 1. Mitotic phase During mitosis the chromosomes are paired and then divided prior to cell division
G1phase: During this phase, the cells make a decision to either exit the cell cycle or become dormant or terminally differentiated or to continue dividing.
S phase This is an chief(prenominal) stage of the cell cycle during which the DNA is replicated. This is the DNA subtraction phase. Additionally, some specialized proteins like histones are also synthesized during S phase.
G2 phase: This...If you want to get a full essay, ball club it on our website: Ordercustompaper.com



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