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What connects the two sister chromatids?

centromere

What is the exchange of segments of DNA between the members of a pair of chromosomes?

Explanation: Crossing over is an event that occurs during prophase I of meiosis which includes the exchange of genetic material between the members of a pair of chromosomes (between non-sister chromatids of homologous chromosomes). It results in genetic recombination and consequently leads to creation of variation.

Do animal cells form new cell walls when they divide?

Animal cells form new cell walls when they divide. Cytokinesis differs in plant cells and animal cells. Cytokinesis differs in plant cells and animal cells.

Why do the cells lining the stomach divide more quickly?

Why do the cells lining the stomach divide more quickly than those in the liver? They are much smaller cells. They have fewer chromosomes. They need much more surface area.

What cells stop dividing after maturity?

Others, such as nerve cells, lose their capability to divide once they reach maturity. Some cells, such as liver cells, retain but do not normally utilize their capacity for division. Liver cells will divide if part of the liver is removed. The division continues until the liver reaches its former size.

What happens when cells stop dividing?

When aging cells stop dividing, they become “senescent.” Scientists believe one factor that causes senescence is the length of a cell’s telomeres, or protective caps on the end of chromosomes. Every time chromosomes reproduce, telomeres get shorter. As telomeres dwindle, cell division stops altogether.

What happens when less mature cells divide too rapidly?

DNA damage can turn off genes involved in cell-signaling pathways. Turning off. cause less-mature cells to divide too rapidly, often leading to the development of​ jyfye9775 is waiting for your help.

What is a result of preventing spindle fibers from forming?

What is a result of preventing spindle fibers from forming? The cell cycle skips Go phase and repeats G1 phase. Mitotic division is skipped, and the cell cycle proceeds to cytokinesis. Mitotic division stops in metaphase and cannot proceed to anaphase.

Why is important that cells have a control system to regulate the timing of cell division?

Why do you think it is important that cells have a “control system” to regulate the timing of cell division? It is important that cells have a “control system” because without it cells would either divide too fast or cause tumors to grow (cancer), or divide too slow and not be able to perform their cellular functions.

What are the two types of proteins that regulate the cell cycle and how do they work?

Two groups of proteins, called cyclins and cyclin-dependent kinases (Cdks), are responsible for the progress of the cell through the various checkpoints. The levels of the four cyclin proteins fluctuate throughout the cell cycle in a predictable pattern (Figure 2).

What are 3 reasons it is so important for cells to be able to divide?

Cell division is necessary for the growth of organisms, repair of damaged tissues, healing and regeneration, and reproduction.