Biology, 12.08.2020 06:01 milkshakegrande101
Na espécie humana ocorrem quatro grupos sanguíneos do sistema ABO – A, B, AB e 0 (zero) –, relacionados à presença de certos antígenos na membrana dos glóbulos vermelhos. A genealogia adiante revela grupos sanguíneos do sistema ABO. A análise da genealogia sugere que
a) o indivíduo II-2 pertence ao grupo sanguíneo A.
b) a probabilidade de o indivíduo II-4 ser do grupo 0 (zero) é 100%.
c) o indivíduo II-1 não apresenta os aglutinogênios A nem B, antígenos que são glicoproteínas.
d) o alelo IA é dominante em relação ao alelo IB e os indivíduos ii não possuem as aglutininas anti-A e anti-B.
e) o casal I-1 x I-2 pode vir a ter filhos dos quatro grupos sanguíneos do sistema ABO.
Answers: 3
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Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.
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