Mendelian Human Genetic Traits
Heredity and
Genetics
Mendelian Human Genetic
Traits
Tongue Rolling
T- tongue roller
Dominant
Tt or TT
t - non-roller
Recessive
tt
Attached Earlobes
E- Earlobes
Dominant
EE or Ee
e- no earlobes
Recessive
ee
Interlocking Fingers
I- interlocking
fingers (left thumb)
Dominant
II or Ii
i- interlocking
fingers (right hand)
Recessive
ii
Dimples
D- Dimples
Dominant
DD or Dd
d- no dimples
Recessive
dd
Sex
Male XY
Female XX
Bent Little Finger
L- Bent Little
Finger
Dominant
LL or Ll
l- Non-bent Little
Finger
Recessive
ll
Hitchhiker Thumb
N- No Hitchhiker
Thumb
Dominant
NN or Nn
n- Hitchhiker
Thumb
Recesive
nn
Freckles
F- Freckles
Dominant
FF or Ff
f- no Freckles
Recessive
rr
Widow
’
s Peak
W- widows peak
Dominant
WW or Ww
w- no widow
’
s
peak
Recessive
ww
PTC Taste
(
phenylthiocarbamide)
P- PTC Taster
Dominant
PP or Pp
p- non-Taster
Recessive
pp
Sodium Benzoate Taste
S- Sodium
Benzoate Taster
Dominant
SS or Ss
s- Sodium
Benzoater Non-
Taster
Recessive
ss
Thiourea Taste
T- Thiourea
Taster
Dominant
TT or Tt
Thiourea Non-
Taster
Recessive
Tt
Explore various Mendelian human genetic traits such as tongue rolling, attached earlobes, interlocking fingers, dimples, sex determination, bent little finger, hitchhiker thumb, freckles, widow's peak, PTC taste sensitivity, sodium benzoate taste sensitivity, and thiourea taste sensitivity. Understand the inheritance patterns of dominant and recessive alleles for each trait.
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Presentation Transcript
Heredity and Genetics Mendelian Human Genetic Traits
Tongue Rolling T- tongue roller Dominant Tt or TT t - non-roller Recessive tt
Attached Earlobes E- Earlobes Dominant EE or Ee e- no earlobes Recessive ee
Interlocking Fingers I- interlocking fingers (left thumb) Dominant II or Ii i- interlocking fingers (right hand) Recessive ii
Dimples D- Dimples Dominant DD or Dd d- no dimples Recessive dd
Sex Male XY Female XX
Bent Little Finger L- Bent Little Finger Dominant LL or Ll l- Non-bent Little Finger Recessive ll
Hitchhiker Thumb N- No Hitchhiker Thumb Dominant NN or Nn n- Hitchhiker Thumb Recesive nn
Freckles F- Freckles Dominant FF or Ff f- no Freckles Recessive rr
Widows Peak W- widows peak Dominant WW or Ww w- no widow s peak Recessive ww
PTC Taste (phenylthiocarbamide) P- PTC Taster Dominant PP or Pp p- non-Taster Recessive pp
Sodium Benzoate Taste S- Sodium Benzoate Taster Dominant SS or Ss s- Sodium Benzoater Non- Taster Recessive ss
Thiourea Taste T- Thiourea Taster Dominant TT or Tt Thiourea Non- Taster Recessive Tt
