The Ability to Roll the Edges of the Tongue Upward

question 7

Multiple Choice

The ability to roll the edges of the tongue upward in a U-shape has been considered to be an inherited ability.The standard assumption is that tongue-rolling is a dominant allele at a single gene locus.Which of the following would cast doubt on this assumption?

• A)Behaviors are not inherited,only structures are inherited.
• B)A student who cannot roll his tongue has a mother and father,both of whom can.
• C)A student who can roll his tongue has a mother and father,both of whom cannot.
• D)With very little effort the non-tongue-rollers can learn to also roll their tongues.
• E)A student who can roll his tongue has a mother and father,both of whom cannot roll their tongues AND with very little effort the non-tongue-rollers can learn to roll their tongues.

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Definitions:

Katz Index

A standardized scale used to assess an elderly patient's ability to perform daily living activities independently.

Lawton IADL Scale

An instrument used to assess an individual's ability to perform instrumental activities of daily living, reflecting their functional independence.

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A state of physical, emotional, and mental exhaustion that can occur when caregivers don't get the help they need, or if they try to do more than they're able to.

Primary Caregiver

The main person responsible for providing care and support to a dependent individual, often in a home setting.