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The Ability to Perceive a Bitter Taste from Certain Chemicals

question 75

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The ability to perceive a bitter taste from certain chemicals, including PTC, has been linked to certain alleles. Which of the following would provide an explanation for the fact that almost all nonhuman primates have the "taster" phenotype, whereas the human population has a significant percentage of "nontaster" phenotypes?


Definitions:

Exemption

A deduction allowed by law to reduce the amount of income that would otherwise be taxed. These are often provided for the taxpayer, their spouse, and dependents.

Full-Time Student

An individual enrolled in a higher education institution for the number of hours or courses the school considers to be full-time attendance.

Working as a Clerk

Employment involving performance of administrative duties, such as filing, keeping records, or assisting customers.

Qualifying Relative

A tax term that refers to a relative or even a non-relative who meets certain IRS criteria, allowing the taxpayer to claim them as a dependent for tax purposes.

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