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Ctenocephalides orientis, who is a member of the Flea-order (Siphonoptera) has 14 chromosomes i all. That is 7 chromosome-pairs.

This is commonly denoted as: 2n = 14

Please note, that this cannot be extrapolated to all other species in Siphonoptera. Other species (that I know of) varies fra 2n = 10 to 2n = 18.

Source: Thomas C and Prasad RS:

Chromosome elimination in Ctenocephalides orientis (Siphonaptera) (Cytobios, 1980)

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Q: How many chromosomes does a flea have?
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