One of Two Major Forms of a Human Condition Called

question 20

Multiple Choice

One of two major forms of a human condition called neurofibromatosis (NF 1) is inherited as a dominant, although it may be either mildly to very severely expressed. If a young child is the first in her family to be diagnosed, which of the following is the best explanation?

• A)The mother carries the gene but does not express it at all.
• B)One of the parents has very mild expression of the gene.
• C)The condition skipped a generation in the family.
• D)The child has a different allele of the gene than the parents.

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