What term correctly describes change in allele frequency due to random effect of a small population?
A. mutation
B. selection
C. non-random mating
D. genetic drift
E. immigration
B
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A couple wants to start a family, but they are concerned that their child might have cystic fibrosis. After taking a
family history, you determine that while neither of them have the disease, the woman had a sister with cystic fibrosis (with unaffected parents), and the man's father also had cystic fibrosis. What do you tell them?
What will be an ideal response?Which of the following is the smallest unit in terms of size?
A. quadriceps B. myofibril C. muscle fiber D. sarcomere E. myofilaments
Protons and neutrons make up the atom's central core, which is referred to as its ________.
A. center of gravity B. valence number C. isotope D. nucleus
Which of the following is not true of conjugation?
A. Involves the action of bacteriophage B. Involves direct contact between cells C. Transfers genes for enzymes and adherence molecules D. The donor retains a copy of the transferred genes E. Transfers genes for drug resistance