A person with an inherited disorder has children with a person who does not have the condition. Half the children have the disorder, both sons and daughters. How is this condition inherited?
A) autosomal recessive
B) autosomal dominant
C) aneuploidy
D) X-linked recessive
E) X-linked dominant
Answer: B
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A black guinea pig crossed with an albino guinea pig produced twelve black offspring. When the albino was crossed with a second black animal, six blacks and six albinos were obtained. What is the best explanation for this genetic situation?
A) Albino is recessive; black is dominant. B) Albino is dominant; black is incompletely dominant. C) Albino and black are codominant. D) Albino is recessive; black is codominant.
Which of the following pathogens is spread by infected lice?
A) Borrelia burgdorferi B) Plasmodium falciparum C) Rickettsia prowazekii D) Yersinia pestis
The enzyme that cleaves the mRNA transcript targeted by siRNA is:
A. Drosha. B. Dicer. C. Argonaute. D. RNase A.
What has a rich supply of nerve endings?
A. Clitoris B. Smegma C. Hymen D. Ovum