Biology, 25.10.2019 21:43 carms12

Your skin is constantly producing new cells through division. how does this happen? during interphase, how does a cell prepare for division? describe cell division, including the process of mitosis and cytokinesis. be sure to describe the mitotic steps.

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Interphase
During interphase, there are three subdivisions: G1, S, and G2. G1 is the growth and development phase. S phase is when the cell duplicates its DNA, so that it can distribute it. In G2, the cell finishes its preparations for mitosis by checking the DNA and ensuring the mitotic proteins are present.

Steps of Mitosis

Prophase
The mitotic spindle begins to form, the nucleolus disappears, the nuclear envelope breaks down and the chromosomes begin to condense.
Metaphase
During metaphase, the chromosomes line up at the metaphase plate in the center of a cell. The chromosomes are connected to the mitotic spindle on either side.
Anaphase
Motor proteins drive this process by pulling the sister chromatids apart towards opposite ends of the cell.
Telophase
The chromosomes begin to de-condense, the nuclear envelope and the nucleolus reappears, and the spindle fibers disappear.
Cytokinesis
After telophase, cytokinesis is the splitting of the cytoplasmic material. It completes cell division.

Hope this helps! :)

Answer from: Quest

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."

Answer from: Quest

answer:

sequence 1- deletion

2- duplication

3- insertion

4- substitute

5- inversion

This is post test! drag each label to the correct location. match the changed nucleotide sequence

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