Bio Lab 6: PTC Tasting and PCR Final Exam Q & As (Verified Answers) 2026

Bio Lab 6: PTC Tasting and PCR Final
Exam Q & As (Verified Answers) 2026
explain how genotype relates to phenotype when it comes to a persons ability to taste chemical PTC -
CORRECT ANSWERS homogenous dominant TT: very bitter unpleasant taste

Heterozygous Tt: mildly bitter

homozygous recessive tt: cannot taste anything



when given level of ability to taste the chemical PTC, be able to make predictions about the genotype of
that individual - CORRECT ANSWERS strong taster: TT all tongue receptors bind to PTC

non-taster: tt, no tongue receptors bind to PTC

mild taster: Tt, only half of the tongue receptors bind



explain the purpose of PCR - CORRECT ANSWERS to amplify and make billions of copies of
a specific region of DNA. in this case the PTC gene



function of template DNA in PCR - CORRECT ANSWERS the DNA that is being used to be
copied



function of master mix in PCR - CORRECT ANSWERS holds all the components for an
optimum environment for the DNA to replicate



taq polymerase - CORRECT ANSWERS replicates the DNA template during elongation



primers - CORRECT ANSWERS binds to template DNA and allows it to copy prolifically
(annealing)