In Studies of Extended Families in Which Some Members Are

question 36

Multiple Choice

In studies of extended families in which some members are affected by a disease and other members are unaffected by it, which of the following must be established in order to identify genetic linkage?

• A) Both affected and unaffected members have the marker.
• B) Family members affected by the disease do not have the marker.
• C) The marker is only present in one family and not in other families.
• D) Family members with the disease have the marker; unaffected members do not have the marker.

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Definitions:

Anterograde Amnesia

A loss of the ability to create new memories after the event that caused the amnesia, leading to a partial or total inability to recall the recent past.

Iconic Memory

A component of the visual memory system which includes a very brief (<1 second) recall of visual images.

Echoic Memory

A subsystem of sensory memory that retains auditory information for a short period after the original sound has ceased.

Selectively Noticing

The cognitive process of focusing attention on certain stimuli or information while ignoring others, often based on personal relevance or importance.