WebDNA can unwind from histones. When DNA is wrapped around histones, the genes cannot be transcribed into RNA (and, eventually in protein). So these enzymes come along called HATs, which chemically modify the histones in effect loosening their grip on the DNA. The 46 chromosomes of a human cell are organized into 23 pairs, and the two … WebAug 8, 2024 · In anaphase, the chromatids separate and are pulled by the microtubules to opposite ends of the cell. Finally, in telophase, the nuclear envelopes reappear, the chromosomes unwind into chromatin, and the cell undergoes cytokinesis, which splits the cell into 2 identical daughter cells.

Why does the DNA unwind? - Answers

WebChromosomes condense and centrosomes move to the opposite sides of the cell. Metaphase 2: The centrosomes have two kinetochores that attach to spindle fibres from the centrosomes at opposite ends of the cell. Anaphase 2: Here, the spindle fibres contract and separate from non-sister chromatids. WebMar 12, 2024 · This test looks for changes to chromosomes in bone marrow cells and myeloma cells. Changes in your DNA can give doctors an idea of how aggressive your … north carolina payday loans

Solved Question 14 of 50 2 Points Which of the following - Chegg

WebIn human cells, which have 23 pairs of chromosomes, the number of chromosomes (2 n = 46) remains unchanged from the beginning till the end of mitosis. The phases are in the following sequence: prophase, … WebMar 16, 2010 · Most of the time during a cell's life, the DNA stays unwound as chromatin, only when mitosis or meiosis occurs does it condense into chromosomes. This is so it is easier to separate and, since... WebFeb 11, 2011 · Most of the time during a cell's life, the DNA stays unwound as chromatin, only when mitosis or meiosis occurs does it condense into chromosomes. This is so it is easier to separate and, since... how to reset aws iam user password