In a person with the genotype XXY, we can tell that nondisjunction took place in the mother
A. true
B. false
B
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Sponges are atypical animals because they
(a) reproduce sexually. (b) are heterotrophic. (c) lack definite tissues. (d) are multicellular.
A farmer performs truncation selection to try to increase the weight of peaches in his orchard. Which statement correctly describes a possible outcome of this selection?
A) If peach weight is not heritable, the average weight in the next generation will increase. B) If peach weight is heritable, the average weight in the next generation will increase. C) The average peach weight will decrease due to this inbreeding. D) If peach weight is heritable, the average weight in the next generation will decrease.
During the formation of gametes for sexual reproduction, DNA is exchanged among the chromosomes, which varies the genetic information passed to the offspring. What is this process called?
A) DNA replication B) translation C) transcription D) crossing over
Which of the following microbes is not correctly matched to an acceptable control method?
A) Enveloped virus: glutaraldehyde-based detergents B) Endospore: autoclaving C) Mycobacteria: hydrogen peroxide D) Prions: chlorine treatment E) Protozoan: boiling water