What is the mnemonic for mitosis?
Stages of mitosis: prophase, metaphase, anaphase, telophase. Cytokinesis typically overlaps with anaphase and/or telophase. You can remember the order of the phases with the famous mnemonic: [Please] Pee on the MAT.
What is meant by mitotic spindle?
Definition. The mitotic spindle is the microtubule-based bipolar structure that segregates the chromosomes in mitosis. The poles of the mitotic spindle are made up of centrosomes and the chromosomes are lined up at the spindle equator to ensure their correct bi-orientation and segregation.
What is a mitotic clock?
The ability to accurately and efficiently detect the acceleration in the stem cell mitotic “tick rate”—a so-called mitotic clock—could be a useful tool for predicting cancer risk.
What is the function of mitotic spindles in a cell?
The mitotic spindle is the macromolecular machine that segregates chromosomes to two daughter cells during mitosis.
What is the mitotic spindle and what role does it play in mitosis?
The mitotic spindle is a highly dynamic molecular machine composed of tubulin, motors, and other molecules. It assembles around the chromosomes and distributes the duplicated genome to the daughter cells during mitosis.
What structures in the nucleus serve as a mitotic clock?
anatomy and physiology
| Question | Answer |
|---|---|
| The structures in the nucleus that serve as a “mitotic clock” are | telomeres |
| The two types of genes that, when abnormal, cause cancer are | tumor suppressors and oncogenes. |
| A cell that can divide to give rise to any cell type is | totipotent |
| Apoptosis is also known as | programmed cell death |
What happens to chromosomes during the late G phase of mitosis?
This cell is in interphase (late G phase) and has already copied its DNA, so the chromosomes in the nucleus each consist of two connected copies, called sister chromatids. You can’t see the chromosomes very clearly at this point, because they are still in their long, stringy, decondensed form.
What are the names of the five phases of mitosis?
Some textbooks list five, breaking prophase into an early phase (called prophase) and a late phase (called prometaphase). These phases occur in strict sequential order, and cytokinesis – the process of dividing the cell contents to make two new cells – starts in anaphase or telophase.
Which is the fifth phase of somatic cell?
A fifth “phase,” known as interphase, is the state in which a somatic cell spends most of its lifespan. Note: you will not need to know the names of these phases for the AP® Biology exam, but you will still be required to describe the steps.
When does cytokinesis start and end in mitosis?
Cytokinesis, the division of the cytoplasm to form two new cells, overlaps with the final stages of mitosis. It may start in either anaphase or telophase, depending on the cell, and finishes shortly after telophase. In animal cells, cytokinesis is contractile, pinching the cell in two like a coin purse with a drawstring.