Assume brown eyes is completely dominant to blue eyes and this trait is controlled by a single gene. If
400 people in a population of 10,000 have blue eyes, how many people would be expected to be
heterozygous for this trait? (Hint: use the Hardy-Weinberg formula)
A. 800
B. 540
C. 320
D. 960
E. It is not possible to determine with the information provided.
C
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Gregor Mendel ____
a. discovered the structure of DNA b. claimed that each individual carries a pair of "factors" for a given trait c. demonstrated that traits carried by parents are "blended" in their offspring d. cross-bred thirty different species of pea plants over a span of fifty years e. reasoned that each parent carries one gene for a specific trait
A woman has six fingers, but one of her parents has five fingers. She marries a man who has
five fingers. What is the probability that they will have a child who is homozygous dominant for this trait?
a. 0 percent b. 25 percent c. 50 percent d. 100 percent
Mitochondrial crista junctions
A) are large pores in the inner membrane. B) are associated with the movement of material from the cytosol into the intermembrane space. C) contain the mitochondrial DNA. D) connect thylakoid membranes. E) limit movement of material between the intracristal and intermembrane spaces.
Each of the following is a voltage-gated Na+ channel property except
A) opens rapidly when stimulated. B) closes rapidly in absence of stimulus. C) opens to a variable extent depending on how much the stimulus voltage exceeds the threshold voltage. D) has a voltage sensor helix that controls channel gating. E) can be inactivated by the inactivating particle part of the channel protein.