Practice Questions

TLS Online TPP Program

#Question id: 12428

Flycatcher birds that migrate from Africa to Europe feed their nestlings mostly with moth caterpillars. The data presented show the mean dates of egg laying, hatching, and fledging of flycatcher young, and the 1980 and 2000 peak mass of caterpillars.

Why are ecologists concerned about the shift in date from May 28 in 1980 to May 15 in 2000 of the caterpillar peak mass?

#Unit 10. Ecological Principles

The caterpillars will eat much of the foliage of the trees where flycatchers nest, and their nests will be more open to predation.
The earlier hatching of caterpillars will compete with other insect larval forms on which the flycatchers also feed their young.
The flycatcher nestlings in 2000 will miss the peak mass of caterpillars and may not be as well fed.
The flycatchers will have to migrate sooner to match their brood-rearing season with the time of caterpillar peak mass.

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TLS Online TPP Program

#Question id: 15661

#Unit 8. Inheritance Biology

Which of the following is NOT true of a maternal effect gene?

TLS Online TPP Program

#Question id: 15666

#Unit 8. Inheritance Biology

Which of the following could NOT be used to describe a sex limited trait:

TLS Online TPP Program

#Question id: 15668

#Unit 8. Inheritance Biology

How is genetic transfer different from sexual reproduction?

TLS Online TPP Program

#Question id: 15669

#Unit 8. Inheritance Biology

Which of the following is a description of generalized transduction?

TLS Online TPP Program

#Question id: 15670

#Unit 8. Inheritance Biology

A researcher would like to map the location of galE and trpA genes in a new species of bacterium that appears to be closely related to E. coli. He decides to use cotransduction, and generates appropriate donor and recipient strains. He is disappointed when cotransduction is not seen in his experiement. What is the most reasonable explanation for this situation?

TLS Online TPP Program

#Question id: 15833

#Unit 8. Inheritance Biology

Your friends Ben and Jane are contemplating having children and seek your genetic counsel. Ben and Jane are unrelated, but both have younger brothers with the same, extremely rare genetic trait. (In fact, Ben and Jane met at a support group meeting for children and families of children with this rare disorder.) Ben’s parents and Jane’s parents are all unaffected.

Assume that the trait is autosomal dominant with 80% penetrance in heterozygotes and 100% penetrance in homozygotes. If not affected, what is the probability that the child is a carrier?