A small aquatic crustacean called Ceriodaphnia cornuta has two distinct phenotypes, one with
\"horns\" and one without.The researcher wanted to know whether the horns had any benefit in
discouraging fish from eating the daphnia. So, in a large tank he put many C.cornuta in a 3 to 1
ratio with 3 unhorned to everyone with horns. He then introduced a natural predator of the
daphnia, a small fish. After an hour, he removed the fish, \"sacrificed\" it, and looked at the
daphnia in its belly. Of the 44 daphnia that the fish had eaten, 40 were unhorned and 4 were
horned. Is there any true pattern in which phenotype was eaten? Use chi square.
Solution.
A small aquatic crustacean called Ceriodaphnia cornuta has two disti.pdf
1. A small aquatic crustacean called Ceriodaphnia cornuta has two distinct phenotypes, one with
"horns" and one without.The researcher wanted to know whether the horns had any benefit in
discouraging fish from eating the daphnia. So, in a large tank he put many C.cornuta in a 3 to 1
ratio with 3 unhorned to everyone with horns. He then introduced a natural predator of the
daphnia, a small fish. After an hour, he removed the fish, "sacrificed" it, and looked at the
daphnia in its belly. Of the 44 daphnia that the fish had eaten, 40 were unhorned and 4 were
horned. Is there any true pattern in which phenotype was eaten? Use chi square.
Solution
