The ability to curl your tongue is an autosomal dominant trait. 100 students wer

Question

The ability to curl your tongue is an autosomal dominant trait. 100 students were randomly chosen from Introductory Biology labs and surveyed for their ability to curl their tongues. Of the 100 students, 30 students could not curl their tongue (i.e., they were homozygous recessive for the trait or tt); 70 students could curl their tongue, and of these 30 were homozygous dominant (TT). What is the frequency of the recessive allele (t) in this population of 100 s

0.60

b. 0.30

c. 0.50

d. 0.70

0.60

b. 0.30

c. 0.50

d. 0.70

Explanation / Answer

Frequency of any gene in the population is given by

Allele frequency of the allele suppose X is given by

( Allele present in homozygous population + gene present in heterozygous population / Total number of alleles in the population

In homozygous population, there are two alleles so we have to multiply 30 by 2

(2*30+40)/ 200=   0.5

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