Two Researchers Experimentally Formed Tetraploid Frogs by Fertilizing Diploid Eggs

question 27

Multiple Choice

Two researchers experimentally formed tetraploid frogs by fertilizing diploid eggs from Rana porosa brevipoda with diploid sperm from Rana nigromaculata.When they mated these tetraploid frogs with each other,most of the offspring that survived to maturity were tetraploid,with chromosome sets of both diploid parent species.Based on these results,if this type of tetraploid formed in the wild,what would be the result? (Y.Kondo and A.Kashiwagi.2004.Experimentally induced autotetraploidy and allotetraploidy in two Japanese pond frogs.Journal of Herpetology 38(3) :381-92.)

• A)The two parent species would interbreed and fuse into one species.
• B)The two parent species would recognize each other as mates.
• C)The tetraploids would be reproductively isolated from both parent species.
• D)The tetraploids would be selected against.
• E)All of the above answers are correct.

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Definitions:

Virulent

Describes a pathogen or microbe that is highly infectious, dangerous, or capable of causing severe disease.

Transmission

The act or process of transferring something from one place, person, or thing to another, often used in the context of diseases, information, or genetic traits.

Parasites/pathogens

Organisms that live on or in a host organism and cause harm or disease to the host.

Endogenous Retroviruses

Viral sequences in the genome that result from ancient viral infections in the lineage of a species, now transmitted vertically from parent to offspring.