Table of Contents
- 1 What phase of mitosis is used to produce a karyotype?
- 2 Which cells can be used to produce a karyotype?
- 3 What stage of cell division will chromosome form?
- 4 Why must cells be in mitosis for a karyotype?
- 5 How do you do karyotypes?
- 6 Why is karyotype done at metaphase?
- 7 How are daughter cells created in mitosis cell division?
- 8 What are the names of the two cycles of cell division?
- 9 What happens during the interphase stage of cell division?
What phase of mitosis is used to produce a karyotype?
Metaphase However, during metaphase of mitosis or meiosis the chromosomes condense and become distinguishable as they align in the center of the dividing cell. Metaphase chromosomes are used during the karyotyping procedure that is used to look for chromosomal abnormalities.
Which cells can be used to produce a karyotype?
Karyotypes are prepared from mitotic cells that have been arrested in the metaphase or prometaphase portion of the cell cycle, when chromosomes assume their most condensed conformations. A variety of tissue types can be used as a source of these cells.
Which phase of cell division is photographed in order to make a karyotype?
metaphase
IB Biology Year 1 Review
| Question | Answer |
|---|---|
| Which phase of cell division is photographed in order to make a karyotype? | metaphase |
| Which process is used in polymerase chain reaction (PCR)? | DNA replication |
| If the haploid number of a species is 14, how many chromatids will there be in metaphase I in a dividing diploid cell? | 56 |
What stage of cell division will chromosome form?
prophase
During prophase, the nucleus disappears, spindle fibers form, and DNA condenses into chromosomes ( sister chromatids ).
Why must cells be in mitosis for a karyotype?
The goal of the mitotic cell division is the faithful transmission of chromosomes to the daughter cells. To fulfil a correct separation of sister chromatids, kinetochores of all chromosomes should be correctly attached to spindle microtubules of opposite poles and should all be under tension.
What is anaphase cell division?
Anaphase is the fourth phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes.
How do you do karyotypes?
To observe a karyotype, cells are collected from a blood or tissue sample and stimulated to begin dividing; the chromosomes are arrested in metaphase, preserved in a fixative and applied to a slide where they are stained with a dye to visualize the distinct banding patterns of each chromosome pair.
Why is karyotype done at metaphase?
Karyotype is done at metaphase because metaphase is the only stage in cell cycle when the chromosomes are unduplicated and line up along the equatorial plate of the spindle. The chromosomes are easier to see when they are elongated and uncondensed.
How is karyotyping done?
Karyotype testing can be done using almost any cell or tissue from the body. A karyotype test usually is done on a blood sample taken from a vein. For testing during pregnancy, it may also be done on a sample of amniotic fluid or the placenta.
How are daughter cells created in mitosis cell division?
Since the daughter cells have exact copies of their parent cell’s DNA, no genetic diversity is created through mitosis in normal healthy cells. Mitosis cell division creates two genetically identical daughter diploid cells. The major steps of mitosis are shown here.
What are the names of the two cycles of cell division?
The Meiosis Cell Cycle Meiosis has two cycles of cell division, conveniently called Meiosis I and Meiosis II. Meiosis I halves the number of chromosomes and is also when crossing over happens. Meiosis II halves the amount of genetic information in each chromosome of each cell.
How does a cell prepare for cell division?
Either way, after synthesis, the cell must prepare for cell division. After the DNA has been replicated during synthesis stage, the cell enters a second gap stage, known as Gap 2 or G 2. During G 2 the cell the cell adds volume to the cytoplasm, and replicates many important organelles.
What happens during the interphase stage of cell division?
During interphase, the cell acquires nutrients, creates and uses proteins and other molecules, and starts the process of cell division by replicating the DNA. Interphase is divided into three distinct stages, Gap 1, Synthesis, and Gap 2, which are discussed below.