The same genetic condition that causes sickle-cell anemia can also protect against:
A. HIV.
B. hemophilia.
C. malaria.
D. cholera.
Answer: C. malaria.
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Given an inheritance pattern of incomplete dominance and 81 flowers that are red (R1R1), 18 flowers that are pink (R1R2), and 1 flower that is white (R2R2), the frequency of the R1 allele is 0.9
Indicate whether the statement is true or false
Calcium ions are involved in muscle contraction by
A. manufacturing ATP. B. causing the muscle cell to depolarize. C. binding to the troponin-tropomyosin complex and exposing actin. D. repairing the damage done during contraction.
If there are 32 sister chromatids in a normal somatic cell, how many chromosomes are there?
A. 32 B. 64 C. 16 D. 8
A predisposing factor in pseudomembranous colitis is:
A. diet high in fatty products. B. neonatal age. C. clindamycin treatment. D. older age (older than age 60 years). E. diet high in dairy products.