Questions and Answers
Which of the following is the major cause of most cases of achondroplasia?
New mutations
What is the frequency of achondroplasia in live births?
1 in 25,000
Which specific mutations in the FGFR3 gene are responsible for achondroplasia?
1138G>A and 1138G>C
When do new mutations in the FGFR3 gene occur for achondroplasia?
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What is germline mosaicism?
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How is germline mosaicism suspected?
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What is the definition of penetrance?
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In which type of diseases does penetrance mostly refer to?
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What is reduced penetrance?
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Can penetrance be variable?
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Which of the following accurately describes reduced penetrance?
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What is the difference between reduced penetrance and variable expressivity?
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Which disease has complete penetrance but variable expressivity?
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What is the diagnostic criteria for NF1?
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What is pleiotropy?
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What is the difference between locus and allelic heterogeneity?
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Which disease is an example of allelic heterogeneity?
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What is the frequency of neurofibromatosis type 1 (NF1) in births?
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What is the genetic inheritance pattern of neurofibromatosis type 1 (NF1)?
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