Nancy and Cliff Had Four Children Who Did Not Have

question 70

Multiple Choice

 Nancy and Cliff had four children who did not have cystic fibrosis, but their fifth child was born with the disease. Cystic fibrosis is carried on a recessive gene. Given what you've learned in this chapter, how could this happen?

• A) It wasn't until the fifth child that both parents passed on the allele for this illness.
• B) Recessive genes normally skip a generation, but after the parents had five children, the gene was expressed.
• C) Their fifth child must have been a boy, which makes it more probable that he would have the illness.
• D) Their fifth child must have been a girl, which makes it more probable that she would have the illness.

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Definitions:

Interest Earned

The amount of money gained as profit from an investment over a certain period of time.

Account

A record summarizing all the transactions pertaining to a single item in the financial statements.

Days

The basic unit of time, equal to 24 hours, used to measure duration from one midnight to the next.

Interest Earned

The amount of money made on an investment over a certain period of time due to interest.