While most animals cannot tolerate polyploidy, somemollusks, such as oysters, can. Although wild oystersare diploid, farmed oysters are often made triploid.The advantage of triploidy is that the oysters are sterile, so they expend the energy that would otherwise beused to make unappetizing gametes in the productionof delicious muscle. These meaty triploid oysters aremore valuable commercially than diploids.a. To make triploid oysters, researchers used cytochalasin B, a chemical that can inhibit cell division ineither meiosis I or meiosis II during oogenesis.This drug does not interfere with chromosomereplication. Explain how triploid oysters could begenerated using cytochalasin B.b. Cytochalasin B is toxic to humans, so oyster farmerscannot use this drug. Can you think of an alternatemethod that might enable oyster farmers to producelarge numbers of triploid oysters?

Question

While most animals cannot tolerate polyploidy, some
mollusks, such as oysters, can. Although wild oysters
are diploid, farmed oysters are often made triploid.
The advantage of triploidy is that the oysters are sterile, so they expend the energy that would otherwise be
used to make unappetizing gametes in the production
of delicious muscle. These meaty triploid oysters are
more valuable commercially than diploids.
a. To make triploid oysters, researchers used cytochalasin B, a chemical that can inhibit cell division in
either meiosis I or meiosis II during oogenesis.
This drug does not interfere with chromosome
replication. Explain how triploid oysters could be
generated using cytochalasin B.
b. Cytochalasin B is toxic to humans, so oyster farmers
cannot use this drug. Can you think of an alternate
method that might enable oyster farmers to produce
large numbers of triploid oysters?

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