Final answer:
Karyotypes can detect chromosomal abnormalities like aneuploidy and trisomy but do not show histones.
Explanation:
A karyotype is a visual arrangement of chromosomes used to identify chromosomal abnormalities. It allows to detect changes in chromosome number or structure, such as aneuploidy, trisomy, and other genetic conditions. In a karyotype, histones, which are proteins involved in DNA packaging and gene regulation, are not visible, unlike aneuploidy, polysomy, and trisomy.
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