Identify the disorder caused by a dominant allele
a. achondroplasia
b. cystic fibrosis
c. albinism
d. sickle-cell anemia
e. Down syndrome
ANSWER: a
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What is the general trend globally for increasing species richness?
A. Increasing from east to west across continental land masses. B. Increasing from polar areas towards the tropics. C. Increasing from tropical seas into temperate forests. D. Increasing from the tropics towards polar areas. E. Increasing from clay soil types into organic soils.
Jacob, Monod, and Pardee constructed a mutant strain of E. coli that carried a lacI-gene mutation (encodes the lac repressor). Which is TRUE of this mutant strain?
A. Transcription of the lac operon is repressed. B. Transcription of the lac operon does not change. C. The lac operon is constitutively expressed. D. Nonfunctional proteins are produced. E. The lac operon is constitutively expressed and nonfunctional proteins are produced.
The probability of a match being due to chance diminishes as the number markers used ____________
a. increases b. decreases
The above diagram is an example of ____
a. a closed circulatory system with one heart b. an open circulatory system with one heart c. a closed circulatory system with a three-chambered heart d. an open circulatory system with a two-chambered heart e. a closed circulatory system with a four-chambered heart