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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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tleebergene tleebergene
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6 years ago
A nurse is reviewing the pedigree chart. When checking for a proband, what is the nurse looking for?
 
  a. The person who is first diagnosed with a genetic disease.
  b. The individual who has a disease gene but is phenotypically normal.
  c. The phenotype of genetic material.
  d. The codominance.
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#1
6 years ago
ANS: A
The pedigree chart summarizes family relationships and shows which members of a family are affected by a genetic disease. The pedigree begins with the proband. The person who has a dis-ease gene but is phenotypically normal is a carrier. The phenotype is the result of both genotype and environment; it is not a proband. Codominance is not represented by a proband, but it occurs when the heterozygote is distinguishable from both homozygotes.
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