Polydactyly (the presence of extra fingers and/or toes) is due to the presence o
ID: 272104 • Letter: P
Question
Polydactyly (the presence of extra fingers and/or toes) is due to the presence of a dominant allele "P". The students in Tucker dorm at NC State were surveyed for polydactyly. 81 students were found to be polydactyl. The genotype of each student was also determined with the following results: 88 were genotype PP; 71 were genotype Pp; and 55 were genotype pp. Calculate the percent penetrance for polydactyly in this population of students. Round your answer properly to 3 decimal digits.
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Explanation / Answer
Total students are 214.
Student with phenotype PP and Pp should have polydactyly.
Total number of students with PP and Pp are 88 + 71 =159.
Total students observed with polydactyly are 81.
So, penetrance is 81 x 100 /159 = 51.923%