Down Syndrome Is a Common Disorder

question 22

Multiple Choice

Down syndrome is a common disorder.Which of the following circumstances results in Down syndrome?

• A)Defective,recessive alleles
• B)Defective,dominant alleles
• C)Insufficient number of chromosomes
• D)Extra chromosome

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Definitions:

Tooth Decay

A condition where the structure of the tooth is damaged due to bacterial activity, leading to cavities or caries.

Dentin

The hard, dense, bony tissue that forms the bulk of a tooth beneath the enamel, providing its primary structure.

Digestion

The breakdown of food to small molecules.

Starches

Complex carbohydrates that plants use to store glucose.