You are a genetic counselor, and a couple comes to you with concerns that if they have a child together, he or she
could have cystic fibrosis. Genetic tests reveal that the woman is a carrier for cystic fibrosis but the man is not. How
should you advise them?
a. Half of their children will have cystic fibrosis, and the other half will be carriers.
b. All of their children will have cystic fibrosis.
c. There are no concerns, because none of their offspring have a chance of inheriting the cystic fibrosis allele.
d. While none of their children will have cystic fibrosis, each child will have a 50% chance of being a carrier.
e. All of their children will have a 25% chance of having cystic fibrosis.
ANSWER: d
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What will be an ideal response?
If a small population of mice colonizes a new area away from the range of the original species, the
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If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis?
A) 10 B) 20 C) 40 D) 80
Before the modern era of science, organisms were assigned to species on the basis of
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