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Cells are withdrawn have been sloughed off by the fetus, yet they are still fetal cells and can be used to determine the state of the fetal chromosomes, such as Down's Syndrome and the sex of the baby after a karyotype has been made.
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www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookhumge...
www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookhumgen.html
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You have been given the chromosomes for an individual and will construct a karyotype to look for chromosomal abnormalities. A karyotype is made by photographing cells in mitosis when chromosomes are condensed and easy to see.
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pulse.pharmacy.arizona.edu/dawn_new/science/karyotypes....
pulse.pharmacy.arizona.edu/dawn_new/science/karyotypes.html
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Metaphase cells are required to prepare a standard karyotype, and virtually any population of dividing cells could be used. Blood is easily the most frequently sampled tissue, but at times, karyotypes are prepared from cultured skin fibroblasts or bone marrow cells.
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arbl.cvmbs.colostate.edu/hbooks/genetics/medgen/chromo/...
arbl.cvmbs.colostate.edu/hbooks/genetics/medgen/chromo/cytotech.html
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Make a human karyotype ... The procedure provided here can be used to produce a human karyotype from your own blood cells. This procedure yielded great results considering the limitations of our laboratory setting and our experience. Use the sources provided along with the variations when fitting.
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karyotyping.tripod.com/
karyotyping.tripod.com/
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science lessons for life science/biology cell and inheritance study ... When biologists wish to study human chromosomes, they sometimes photograph the chromosomes through a microscope. After these photographs are enlarged, the chromoomes are cut out and arranged in pairs. The resulting product is called a karyotype.
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teachertech.rice.edu/Participants/dawsonm/cells/Karyoty...
teachertech.rice.edu/Participants/dawsonm/cells/Karyotypes.htm
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When a karyotype is made (see below) the q arm is always put on the bottom and the p on the top. ... A simple karyotype is analysed as such, while for a polyclonal karyotype a composite karyotype is calculated first, and then that composite karyotype is analysed.
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www.steadyhealth.com/encyclopedia/Karyotype
www.steadyhealth.com/encyclopedia/Karyotype
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The karyotype of two species and two subspecies of the genus from Northwest Iran were investigated. Aceto-iron-hematoxilin was used to ... Meristematic region with 1 mm of length excised and macerated in cytase enzyme at room for 2 h. Squash preparations on slides were made in 45% acetic acid (Asghari-Zakaria et al., 2002).
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scialert.net/fulltext/?doi=ajps.2008.417.420
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The cattle karyotype (2n = 60) made up of 58 acrocentric autosomes and 2 sex chromosomes which described as the primitive karyotype for the bovid species (Buckland and Evans, 1978;
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scialert.net/fulltext/?doi=pjbs.2009.896.901
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7. What are two sources of cells typically used for karyotype preparation? White Blood Cells are often used in karyotyping. WBCs don’t divide actively; therefor, they are induced to divide. A karyotype can be made easily from cancer cells since they are actively dividing.
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cibt.bio.cornell.edu/labs/dl/KARY.PDF
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