Which of the following human genetic disorders is caused by a dominant allele?

a. hemophilia
b. sickle cell anemia
c. cystic fibrosis
d. Huntington's disease


Ans: d. Huntington's disease

Biology & Microbiology

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An estimated ________ DNA base pairs comprise the human genome.

A) 32,000 B) 320,000 C) 3.2 million D) 3.2 billion

Biology & Microbiology

Four of the five answers are correct statements about endothermic animals. Select the exception

a. They use more energy than ectotherms. b. They are active at a wider range of temperatures than ectotherms. c. They have a higher metabolic rate than ectotherms. d. They have layers of fat to reduce heat loss. e. They adjust their temperature by changing their location.

Biology & Microbiology

The enzyme used by HIV that allows it to make DNA from RNA is

a. DNA ligase. b. helicase. c. restriction endonuclease. d. reverse transcriptase. e. cholinesterase.

Biology & Microbiology

The anaerobic environment of swamps and marshes is an excellent habitat for methanogens.

a. true b. false

Biology & Microbiology