The same genetic condition that causes sickle-cell anemia can also protect against:

A. HIV.
B. hemophilia.
C. malaria.
D. cholera.


Answer: C. malaria.

Biology & Microbiology

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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

Biology & Microbiology

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.

Biology & Microbiology

If there are 32 sister chromatids in a normal somatic cell, how many chromosomes are there?

A. 32 B. 64 C. 16 D. 8

Biology & Microbiology

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.

Biology & Microbiology