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But when they obtained a couple more specimens they confirmed [their findings].
The number of chromosomes in the karyotype between (relatively) unrelated species is hugely variable.
Although the replication and transcription of DNA is highly standardized in eukaryotes, the same cannot be said for their karyotypes, which are highly variable.
There is variation between species in chromosome number, and in detailed organization, despite their construction from the same macromolecules.
Sometimes observations may be made on non-dividing (interphase) cells.Attention is paid to their length, the position of the centromeres, banding pattern, any differences between the sex chromosomes, and any other physical characteristics.The study of whole sets of chromosomes is sometimes known as karyology.It is New Latin from Ancient Greek κάρυον karyon, "kernel", "seed", or "nucleus", and τύπος typos, "general form").The next stage took place after the development of genetics in the early 20th century, when it was appreciated that chromosomes (that can be observed by karyotype) were the carrier of genes.
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and for a test that detects this complement or measures the number.