Which of the Following Is True About a Key

question 57

Multiple Choice

Which of the following is true about a key?

• A) It may be unique.
• B) It may be non-unique.
• C) In may identify more than one row.
• D) Both A and B
• E) All of the above

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Definitions:

Homologous Chromosomes

In a nucleus, pair of chromosomes that have the same length, shape, and genes.

Duchenne Muscular Dystrophy

A genetic disorder characterized by progressive muscle degeneration and weakness due to alterations of a protein called dystrophin that helps keep muscle cells intact.

Chromosome Deletions

Genetic mutations involving the loss of a segment of DNA from a chromosome, potentially causing diseases or disorders.

X Chromosome

One of the two sex chromosomes, playing a key role in determining genetic sex and carrying genes for many other non-sex related traits.