What fraction of the time will a cross of Aa BB cc with Aa Bb CC produce an offspring of genotype Aa
Bb CC?
a. 1/32
b. 1/16
c. 3/32
d. 1/8
e. 0
E
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Inbred lines of animals, such as laboratory mice, are useful for studying complex traits because:
A. individuals are genetically identical, so differences in traits must be due to environmental differences. B. although individuals differ both genetically and environmentally, the genetic differences are known, so differences in traits can be understood. C. animals are kept in identical environments, so any differences in traits are due to differences in their genes. D. both genetic and environmental differences between individuals are known, making differences in their traits easy to understand. E. None of these choices is correct.
Individuals with extra or missing copies of some of their chromosomes are called ____
a. polyploids b. haploids c. aneuploids d. euploids e. diploids
Cell division in unicellular organisms results in ____ individuals.
a. 4 b. 1 c. 8 d. 2
In his transformation experiments, which of the following results did Griffith observe?
A) Mutant mice were resistant to bacterial infections. B) Mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form. C) Mixing a heat-killed nonpathogenic strain of bacteria with a living pathogenic strain makes the pathogenic strain nonpathogenic. D) Infecting mice with nonpathogenic strains of bacteria makes them resistant to pathogenic strains.