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Home Q & A Board Biology-Related Homework Help Medicine Immunology
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Flognog Flognog
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6 years ago
Directional selection is best described as
 
  a. all polymorphic alleles preserved in a population
  b. T-cell receptor interaction with peptide:MHC complexes directed to a planar interface
  c. a mechanism in T cells that is analogous to affinity maturation of immunoglobulins
  d. selected alleles increase in frequency in a population
  e. selection of most appropriate transplant donor directed at the identification of identical or similar combinations of HLA alleles compared with the transplant recipient.
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heyouheyou
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6 years ago
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