Stages of Mitosis

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prophase

chromosomes become visible, nuclear envelope dissolve, spindle forms

metaphase

chromosomes line up along equator

anaphase

centromeres divide, chromatids (now called chromosomes) move toward opposite poles.

telophase

nuclear envelope forms at each pole, chromosomes uncoil,spindle dissolve, cytokinesis

mitosis

involves the duplication of chromosomes and cell division to produce identical cells--each with the diploid (2n) number of chromosomes= 46 or 23 pair (in humans) Asexual reproduction is associated with mitosis since no sex cells are involved--only one cell dividing to become two identical cells.

meiosis

involves specialized sex cells called gametes--male=sperm;female=egg. The chromosome number is reduced by half to produce gametes with the haploid number (n) =23, so that when egg and sperm joinm the result zygote has 23 chromosomes from its father and 23 from its mother=46 chromosomes. Sexual reproduction is involved with meiosis sice two parents are required.

what number is telophase?

4

what number is anaphase?

3

what number is prophase?

1

what number is metaphase?

2

these are the four phases of mitosis

anaphase,telophase,metaphase,and prophase

this is the phase of mitosis in which the chromosomes line up in the middle of the cell

metaphase

during this phase of mitosis the sister chromotides become separated

anaphase

during this type of cll division the number of chromosomes are reduced by half

telophase

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