All of the following are correct about primary atypical pneumonia except
A. it can also be caused by adenoviruses.
B. it is mainly caused by Mycoplasma pneumoniae.
C. it has symptoms similar to pneumococcal pneumonia.
D. it is transmitted by aerosol droplets.
E. community resistance is high.
Answer: C
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The malolactic fermentation of wine is performed by
A. Lactobaccilus. B. Saccharomyces. C. Leuconostoc. D. Aspergillus.
Koopman’s research on mouse meiosis showed that
a. there is a meiosis promoting gene. b. a meiosis inhibiting gene leads to retinoic acid production. c. retinoic acid prevents meiosis. d. the Cyp26b1 gene is expressed in testes but not ovaries. e. there is no effect if male mice do not have a Cyp25b1 gene.
Genetic drift that occurs in small, new colonies is called ________
Fill in the blank(s) with correct word
Summer squash plants with the dominant allele C bear white fruit, whereas plants homozygous for the recessive allele c bear colored fruit. Summer squash have a second locus that acts as a modifier gene if the plant is colored. IF the plant is colored and is G-- at the second locus, they will be yellow. If they are colored and gg at the second locus, they will be green. What will the ratio of white to yellow to green squash be in a cross between a double heterozygous plant and a double homozygous recessive plant (CcGg x ccgg)?
a. 4:3:1 b. 2:1:1 c. 9:3:3:1 d. 1:4:6:4:1