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Family Pedigree of the Dimple Trait
353
Transcript
Key:
=dominant male
=dominant female
=recessive male
=recessive female
Raymond Douglass
Isabelle Douglass
Isabelle (Grandmother)
D
x
d
Paul Hubbell
Suzanne Hubbell
D
DD
Dd
Robert (grandad)
dd
d
Dd
my dad
- Heterozygous, Dd
- Shows dimple trait, but carries recessive trait
- Heterozygous (Dd)
- Shows dimples, but carries recessive trait
- Heterozygous or Dd
- Dimples
- No dimples
- dd or homozygous recessive
Suzanne (Grandmother)
d
x
d
Paul (grandfather)
D
Dd
d
dd
my mom
Ray
Dad
Alan
David
Jim
Susan
Lauren
Mom
- No dimples
- dd or homozygous dominant
- Homozygous dominant, DD or Dd
- Shows dimple trait
- Dd or DD
- Has dimples, possibly has recessive trait (d)
- Dimples
- Heterozygous or Homozygous Dominant
- no dimples, recessive
- dd (homozygous recessive)
- Has no dimples
- Must be dd
- Has dimples
- Heterozygous or Homozygous dominant, Dd or DD
Mom
D
x
d
Dad
d
dd
Dd
dd
d
me
Bobby
- Has dimples
- Heterozygous, Dd (there is no dominant allele to take from both sides, only one)
Gene Dominance
- having dimples is dominant, no dimples is recessive
- DD=homozygous dominant
- Dd=heterozygous
- dd=homozygous recessive
Bobby
Me
- Does not display dimple trait, so must be dd.
- I have dimples, therefore I'm either Dd or DD
Family Pedigree of Dimple Trait
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