The complete absence of one or more teeth (tooth agenesis) is a common trait in humans-indeed, more than 20% of humans lack one or more of their third molars. However, more severe absence of teeth, defined as missing six or more teeth, is less common and frequently an inherited condition. L. Lammi and colleagues examined tooth agenesis in the Finnish family shown in the pedigree below (L. Lammi, American Journal of Human Genetics 74:1043-1050. 2004). Which of the following modes of inheritance best fits the pattern observed in the pedigree? Note that the phenotypes in generation 1 are not known. 2. 8. 7 8 IV a. Y-linked Ob. X-linked dominant O C. X-linked recessive O d. Autosomal recessive e. Autosomal dominant

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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The complete absence of one or more teeth (tooth agenesis) is a common trait in humans-indeed, more than 20% of humans lack one
or more of their third molars. However, more severe absence of teeth, defined as missing six or more teeth, is less common and
frequently an inherited condition. L. Lammi and colleagues examined tooth agenesis in the Finnish family shown in the pedigree below (L.
Lammi, American Journal of Human Genetics 74:1043-1050. 2004).
Which of the following modes of inheritance best fits the pattern observed in the pedigree? Note that the phenotypes in generation 1 are
not known.
I3D
1 2
3.
4
7 8
II
2.
6.
8.
IV
2.
a. Y-linked
b. X-linked dominant
C. X-linked recessive
d. Autosomal recessive
e.
Autosomal dominant
FEB
17
MacBook Air
...
3.
Transcribed Image Text:The complete absence of one or more teeth (tooth agenesis) is a common trait in humans-indeed, more than 20% of humans lack one or more of their third molars. However, more severe absence of teeth, defined as missing six or more teeth, is less common and frequently an inherited condition. L. Lammi and colleagues examined tooth agenesis in the Finnish family shown in the pedigree below (L. Lammi, American Journal of Human Genetics 74:1043-1050. 2004). Which of the following modes of inheritance best fits the pattern observed in the pedigree? Note that the phenotypes in generation 1 are not known. I3D 1 2 3. 4 7 8 II 2. 6. 8. IV 2. a. Y-linked b. X-linked dominant C. X-linked recessive d. Autosomal recessive e. Autosomal dominant FEB 17 MacBook Air ... 3.
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The pedigree analysis helps us identifying the mode of inheritance of a particular disease by observing the family history. By pedigree analysis we can calculate the probability (chance) of a particular condition or disrase in the upcoming generation.

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