When does pairing up of homologous chromosomes and crossing over occur?
At which phase (s) is it preferable to obtain chromosomes to prepare a karyotype? Mitosis in humans usually results in the formation of _____. Who are the experts? Experts are tested by Chegg as specialists in their subject area. We review their content and use your feedback to keep the quality high. Answer 1.
How many copies of the X chromosome are functional?
Karyotyping is done at metaphase because it is the only stage in cell cycle where the chromosomes are unduplicated and aligned at the equator of the cell. The chromosomes are easier to see when they are elongated and uncondensed.
What happens to homologous chromosomes during meiosis 1?
Karyotyping is done at metaphase because it is the only stage in cell cycle where the chromosomes are unduplicated and aligned at the equator of the cell. The chromosomes are easier to see when they are elongated and uncondensed.
What happens during crossing over in meiosis 1?
Answer to Question 1(5 points) At which phase(s) is it preferable to obtain chromosomes to prepare a karyotype? Question 1 options: early prophase . Study Resources. Main Menu; by School ... At which phase(s) is it preferable to obtain chromosomes to prepare a karyotype? ... Course Hero is not sponsored or endorsed by any college or university. ...
At which phase is it preferable to obtain chromosomes to prepare a karyotype?
Answer and Explanation: The correct answer is option e) late prophase or metaphase.
What is the best phase to study the chromosome?
So, the correct answer is 'Metaphase'.
At what mitosis stage is karyotype?
metaphase
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.
What is the phase of mitosis that is needed for chromosomal analysis?
Metaphase. Next, chromosomes assume their most compacted state during metaphase, when the centromeres of all the cell's chromosomes line up at the equator of the spindle. Metaphase is particularly useful in cytogenetics, because chromosomes can be most easily visualized at this stage.
Which phase is the best phase to study the morphology and shape of the chromosomes?
metaphase
Chromosomal morphology is best observed at metaphase. Metaphase is a stage of mitosis in the cell cycle in which chromosomes are at their most condensed and coiled stage.
At which stage is chromosome morphology best studied in an organism?
metaphase
The morphology of chromosomes can be studied at metaphase.Jul 11, 2014
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.Oct 9, 2013
How are chromosomes arranged in a karyotype?
A karyotype is an organized profile of a person's chromosomes. Two chromosomes specify sex, XX for female and XY for male. The rest are arranged in pairs, numbered 1 through 22, from largest to smallest. This arrangement helps scientists quickly identify chromosomal alterations that may result in a genetic disorder.
How do you identify chromosomes in a karyotype?
To obtain a view of an individual's karyotype, cytologists photograph the chromosomes and then cut and paste each chromosome into a chart, or karyogram, also known as an ideogram. In a given species, chromosomes can be identified by their number, size, centromere position, and banding pattern.Aug 14, 2020
During what stage does the G1, S and G2 phase happen?
Interphase
Interphase is composed of G1 phase (cell growth), followed by S phase (DNA synthesis), followed by G2 phase (cell growth). At the end of interphase comes the mitotic phase, which is made up of mitosis and cytokinesis and leads to the formation of two daughter cells.
During which phase of mitotic cell division do chromosomes separate?
anaphase
Metaphase leads to anaphase, during which each chromosome's sister chromatids separate and move to opposite poles of the cell. Enzymatic breakdown of cohesin — which linked the sister chromatids together during prophase — causes this separation to occur.
What happens during S phase?
The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells.Mar 1, 2022
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