Calculate allele frequencies for the allele that either prevents or permits “tongue rolling,” based on a human breeding population of 500,000 in the San Jose region. Typical 1407 class phenotypic data suggests the following genotypic frequencies present in this population: Frequency of homozygous dominants (RR, the tongue rollers): 0.20 (20%) Frequency of homozygous recessives (rr, the non-rollers): 0.30 (30%) Frequency of heterozygous individuals (Rr, phenotypically tongue rollers): 0.50 (50%) Total No. of alleles present: _____________ Number of dominant alleles possessed by homozygous dominants: _____________ Number of recessive alleles possessed by homozygous recessives: _____________ Number of dominant alleles possessed by heterozygotes: _____________ Number of recessive alleles possessed by heterozygotes: _____________ Total number of dominant alleles in the population: _____________ Frequency of the dominant allele (R) in the population: _____________ Frequency of the recessive allele (r) in the population: _____________
Calculate allele frequencies for the allele that either prevents or permits “tongue rolling,” based on a human breeding population of 500,000 in the San Jose region. Typical 1407 class
Frequency of homozygous dominants (RR, the tongue rollers): 0.20 (20%)
Frequency of homozygous recessives (rr, the non-rollers): 0.30 (30%)
Frequency of heterozygous individuals (Rr, phenotypically tongue rollers): 0.50 (50%)
Total No. of alleles present: _____________
Number of dominant alleles possessed by homozygous dominants: _____________
Number of recessive alleles possessed by homozygous recessives: _____________
Number of dominant alleles possessed by heterozygotes: _____________
Number of recessive alleles possessed by heterozygotes: _____________
Total number of dominant alleles in the population: _____________
Frequency of the dominant allele (R) in the population: _____________
Frequency of the recessive allele (r) in the population: _____________
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