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Download genetic trait guide - Blue Valley Schools
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GENETIC TRAIT GUIDE Simple Dominance : Rh Factor Positive Negative Widow's Peak Present Absent RR or Rr rr Earlobes Unattached Attached EE or Ee ee Dimples Present Absent DD or Dd dd WW or Ww ww Freckles Freckles No freckles FF or Ff ff Incomplete Dominance : Hair Type Curly ZC ZC Wavy ZC ZS Straight ZS ZS Codominance : Blood Type Type A IA IA or IA i Type B IB IB or IB i Type AB IA IB ii Type O Dominant Disorder: Huntington's Affected Unaffected HH or Hh hh Recessive Disorders : Chromosome # Unaffected Carrier Affected Sickle cell 7 Sa Sa Sa sa sa sa Cystic fibrosis 5 Fi Fi Fi fi fi fi PKU 8 Pk Pk Pk pk pk pk Sex-linked ( X chromosome ) Disorders (All located on sex chromosome) Hemophilia A Lesch Nyhan Baldness X HX H X LX L X BX B X HX h X LX l X BX b Affected Male Unaffected Xh Xh XlXl XbXb X Y H XY L XY Affected Xh Y XlY XbY Female Unaffected Carrier B Polygenic (many genes affect the trait) Eye Color Black Brown Hazel Brown Hazel Green Hazel Blue Green Aqua Blue Gray Black (pigment) Brown (pigment) Green (pigment) Blue (pigment) J? jj jj jj jj jj jj jj jj ?? K? K? K? K? kk kk kk kk ?? G? gg G? gg G? G? gg gg ?? S? ss ss S? ss S? S? ss Hair Color Black Dark Brown Red Brown Red Red Blonde Blonde Blonde Brown Light Blonde Brown Black (pigment) Brown (pigment) Red (pigment) Blonde (pigment) M? mm mm mm mm mm mm mm mm ?? N? N? nn nn nn N? nn N? ?? P? P? P? P? pp pp pp pp ?? Q? qq qq Q? Q? Q? qq qq ? mark can either be a dominant allele or a recessive allele. ? mark can either be a dominant allele or a recessive allele.
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