If your mother and father both have cystic fibrosis, which is caused by a recessive allele, the odds of you having cystic
fibrosis are ____.
a. 1/4
b. 1/2
c. 3/4
d. 1
e. 0
ANSWER: d
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The natural habitat of Chryseobacterium sp. can best be described as the:
a. mucous membranes of animals. b. gastrointestinal tract of humans and other animals. c. natural environment. d. genitourinary tract of animals.
A gene for sweat gland production is located on the X chromosome. A man who lacks sweat glands marries a woman who has normal sweat glands. Which of the following are possible phenotypes of their children?
A. All of the boys will lack sweat glands. B. The boys will be mosaic; they will have patches of skin with sweat glands and patches of skin lacking sweat glands. C. Half of the girls will have sweat glands and half of the girls will lack sweat glands. D. Half of the boys will have sweat glands and half of the boys will lack sweat glands. E. The girls will be mosaic; they will have patches of skin with sweat glands and patches of skin lacking sweat glands.
What are the places in the cell cycle where proteins survey the cell to make sure that conditions for a favorable cell division have been met?
What will be an ideal response?
Which of the following products used by humans sometimes comes from plants?
A) fuel, only B) clothing, only C) food, only D) fuel, clothing, and food