During prevention of polyspermy in sea urchin the shift from ___1___ to __2____is the result of a small influx of Na+ into the egg through newly opened sodium channels. Sperm cannot fuse with egg cell membranes that have a ___3___ resting potential, so the shift means that no more sperm can fuse to the egg.

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#Question id: 15665

#Unit 8. Inheritance Biology

In deletion mapping, mutations can be localized to a region of the gene because:

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#Question id: 15666

#Unit 8. Inheritance Biology

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

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#Question id: 15667

#Unit 8. Inheritance Biology

You set up the following dihybrid mapping cross in fruit flies. 

P e+e+ roro cq cq x ee ro+ro+ cq+cq+. After backcrossing F1 males to ee roro cq cq females, you get the following results: gray body, rough eyes, claret eyes 576; ebony body, smooth, red eyes 564. How can you explain this result?

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#Question id: 15668

#Unit 8. Inheritance Biology

How is genetic transfer different from sexual reproduction?

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#Question id: 15669

#Unit 8. Inheritance Biology

 Which of the following is a description of generalized transduction?

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#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?