The right answer is Karyotype
The karyotype corresponds to the representation of chromosomes of the nucleus of a cell seen under microscopy or microphotography, after ordering in pairs according to size. Such a procedure makes it possible to highlight chromosomal abnormalities, such as trisomies, or to define certain characteristics of the individual, such as genetic sex from the sex chromosomes.
I think it can be true or I may be wrong
The second messenger camp is synthesized by the enzyme adenylyl cyclase.
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3) the sort of a cell division when the chromatids separate