Monosomy for autosomes is lethal in humans. If an aborted male fetus had monosomy for
chromosome 6, how would you designate (write) the karyotype? ____________________ Fill in the blank(s) with the appropriate word(s).
ANS: 45, XY, -6
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Horizontal gene transfer between host organisms and their symbionts
A) happens frequently because of coevolution. B) causes genome reduction in the symbiont and genome expansion in the host. C) causes genome reduction in both the host and the symbiont. D) has been observed, but is considered a rare event.
Recall that archaea and bacteria used to be grouped in the same category. How were archaeons first distinguished from other prokaryotes?
A. through differences in cell size and shape B. through the fact that archaeons have linear and not circular chromosomes C. through differences in ribosomal RNA sequences D. through the lack of horizontal gene transfer in archaeons E. through the observation that archaea cell size is independent of diffusion
What might result from the overwatering of houseplants and garden plants?
A) an increase in chlorophyll within the leaves B) decreased rates of transpiration C) dormancy due to loss of leaves D) the formation of hydroids
Which of the following is not a sub field of microbiology?
A. bacteriology B. botany C. clinical microbiology D. virology