Biology Forums - Study Force

Polyploid plants are not uncommon in nature, while polyploid animals are extremely rare. However, there are a
few types of polyploid animals. For example, there is a tetraploid species of rat that lives in Argentina.
a. What does “polyploid” mean, and what does “tetraploid” mean with regards to the total number
of chromosomes in this type of rat?
b. How would a tetraploid rat be different than a typical diploid rat?
c. Explain the process of gamete formation in rats and how it may have contributed to tetraploid strains
of the species. Be sure to include a thorough explanation of meiosis as part of your answer

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