Are You a Supertaster? (VCE SSCE Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the correct hierarchy of taste structures from largest to smallest?
What is the correct hierarchy of taste structures from largest to smallest?
Papillae→taste buds→gustatory cells→receptors
What is PTC (phenylthiocarbamide)?
What is PTC (phenylthiocarbamide)?
A non-toxic compound resembling alkaloids
Who are supertasters?
Who are supertasters?
People who can taste PTC and are more sensitive
What does the TAS2R38 gene code for?
What does the TAS2R38 gene code for?
The TAS2R38 bitter taste receptor
In complete dominance, how are alleles expressed in heterozygous individuals?
In complete dominance, how are alleles expressed in heterozygous individuals?
One allele completely masks the other
What is the genotype of a PTC non-taster?
What is the genotype of a PTC non-taster?
tt (homozygous recessive)
In a cross between two heterozygous tasters (Tt × Tt), what % of offspring will be tasters?
In a cross between two heterozygous tasters (Tt × Tt), what % of offspring will be tasters?
75%
What evolutionary advantage might PTC tasting provide?
What evolutionary advantage might PTC tasting provide?
Helps avoid toxic alkaloids in poisonous plants
Why do some people taste PTC while others don't?
Why do some people taste PTC while others don't?
Different receptor shapes affect PTC binding
Why might TT individuals taste PTC more strongly than Tt individuals?
Why might TT individuals taste PTC more strongly than Tt individuals?
TT has two gene copies producing more receptors