Which Portion of the First Digit Is Labeled as Letter

question 23

Multiple Choice

Which portion of the first digit is labeled as letter C in the figure above?

• A) Proximal phalanx
• B) Middle phalanx
• C) Distal phalanx
• D) Metacarpal

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Definitions:

Locus

A specific location or position on a chromosome where a particular gene or genetic marker is situated.

Chromosome

Colored body in the nucleus, composed of DNA and proteins and containing the primary genetic information of the cell; 23 pairs in humans.

Aneuploidy

A genetic condition characterized by an abnormal number of chromosomes.

Trisomy 21

A genetic disorder caused by the presence of an all or part of an extra 21st chromosome, known as Down syndrome.