You have isolated a set of five yeast mutants that form dark red colonies instead of the usual white colonies of wild-type yeast. You cross each of the mutants to a wild-type haploid strain and obtain the results shown below;

you cross each haploid mutant strain to a different haploid mutant of the opposite mating type. From the results shown below deduce as much as you can about which mutations lie in the same gene. Clearly state any remaining ambiguities and suggest some general ways that the ambiguities might be resolved

a) That mutants 1 and 3 form one complementation group and are mutations in the same gene (gene A) 

b) That mutations 2 and 5 form a second complementation group and are mutations in a second gene (gene B).

c) That mutations 3 and 5 form a second complementation group and are mutations in a second gene (gene B).

d) The first ambiguity is whether mutant 4 has a mutation in gene A or B, or whether it represents a unique gene.

Which of the following is the correct prediction about mutants?

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#Question id: 12572

#Unit 10. Ecological Principles

Use what you know about ecosystem stability and the information provided in the graph below to answer the following question.

Which community (a-e) would likely be the most biodiverse?

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#Question id: 12573

#Unit 10. Ecological Principles

Which of the following conditions is the most likely indicator of a population in an extinction vortex? 

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#Question id: 12574

#Unit 10. Ecological Principles

According to the small- population approach, what would be the best strategy for saving a population that is in an extinction vortex?

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#Question id: 12575

#Unit 10. Ecological Principles

All of the following are adaptations that permit the camel to be active by day in the desert EXCEPT 

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#Question id: 12576

#Unit 10. Ecological Principles

Estimates of current rates of extinction

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#Question id: 12577

#Unit 10. Ecological Principles

During  a  field  trip,  an  instructor  touched  a  moth  resting  on  a  tree  trunk.  The  moth  raised  its  forewings  to  reveal large eyespots on its hind wings. The instructor asked why the moth lifted its wings. One student answered that sensory  receptors  had  fired  and  triggered  a  neuronal  reflex  culminating  in  the  contraction  of  certain  muscles.  A second student responded that the behaviour might frighten predators. Which statement best describes these explanations?