One of Two Major Forms of Neurofibromatosis Results from Inheriting

question 33

Multiple Choice

One of two major forms of neurofibromatosis results from inheriting a dominant allele of a gene with affected individuals having phenotypes that range from mild to very severe. Which of the following is the best explanation for why a young child is the first in her family to be diagnosed with a severe form of the condition?

• A) The mother carries the gene but does not express it.
• B) One of the parents has a mild expression of the gene.
• C) The condition skipped a generation in the family.
• D) The child has one more chromosome than either of the parents.

---

Definitions:

American Independence

The status achieved by the thirteen American colonies, which declared their independence from the British Empire in 1776 with the Declaration of Independence, leading to the American Revolutionary War.

1776

The year most famously known for the Declaration of Independence by the Thirteen Colonies in North America, marking the beginning of the United States of America's journey toward independence from British rule.

Republican Motherhood

The idea that women played an essential role in nurturing the principles of liberty and democracy in their children, contributing to the young American republic's civic virtue.