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The two forms of livestock, identified as taurine and zebu, are basically differentiated from each other by the absence and presence of hump. Fetuses with a few weeks already have hump. Cattle are now represented by about 800 races, a world population of 1.4 billion animals. Around 480 are in...

Jorge, W.
Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Botucatu, Brazil
Veterinária e Zootecnia, 2013, 20, 2, pp 217-237

In the mosquito Culex pipiens, over-production of esterases is a common insecticide resistance mechanism. Different alleles at the esterase A and B loci are known to occur in natural populations, as shown by enzyme electrophoresis and RFLP studies on the esterase B locus. The authors analysed the...

Guillemaud, T.; Rooker, S.; Pasteur, N.; Raymond, M.
Heredity, 1996, 77, 5, pp 535-543

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