You are genetic counselor, and a couple comes to you with concerns that if they have a child together
it could have sickle-cell disease. Genetic tests reveal that the man and woman are both carriers for
sickle-cell disease. Which of the following would be a correct thing to tell them?
a. Any child that they produce has a 50% chance of having sickle-cell disease, and the rest
will be carriers.
b. All of their offspring will have sickle-cell disease.
c. They should not have any concerns, as no child that they produce should wind up with
sickle-cell disease.
d. No child that they produce should wind up with sickle-cell disease, but each of their
offspring will have a 50% chance of being a carrier.
e. Any child that they produce will have a 25% chance of having sickle-cell disease.
E
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Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What will be an ideal response?
Given the DNA oligonucleotide 5'-AGTCTAGGCT-3', reconstruct a sequencing gel based on dideoxy sequencing, showing the relative position of each DNA fragment (band) on the gel
What will be an ideal response?
Root hairs:a
protect the delicate cells of the apical meristem. b. help orient the root so it will grow downward. c. increase the capacity of roots to absorb water. d. are sparse and extremely long. e. are located at each node on the root
Consider the following food chain: hawk - rabbit - clover. Each species will contain a different amount of calories in its body (clover: 10 calories, rabbit: 500, and hawk: 1200). Each species has a different daily caloric requirement (clover: sunlight, rabbit: 100 calories, hawk: 300). How many clover plants, per day, does it take to support one rabbit?
A. approximately 10 plants B. approximately 100 plants C. approximately 3 plants D. approximately 50 plants E. approximately 1000 plants