The Gene for Tay-Sachs Disease Codes for a Nonfunctional Form

question 26

Multiple Choice

The gene for Tay-Sachs disease codes for a nonfunctional form of the enzyme hexosaminidase A (or Hex A ) It has been found that a person with only one-third the maximum amount of Hex A can function absolutely normally. Please characterize the heredity of Tay-Sachs disease.

• A) codominant
• B) recessive
• C) dominant
• D) multiple allelic

---

Definitions:

Declaratory Act

A law passed by the British Parliament in 1766 stating that the British government had the same power to tax and make laws for the American colonies "in all cases whatsoever" as it did in Britain.

Stamp Act

Parliament’s 1765 requirement that revenue stamps be affixed to all colonial printed matter, documents, and playing cards; the Stamp Act Congress met to formulate a response, and the act was repealed the following year.

Stamp Act

A 1765 British law imposing a tax on the colonies requiring them to pay a stamp duty on documents, newspapers, and playing cards, leading to widespread protest.