A scientist notices that the males of a bird species vary in the size of their c

Question

A scientist notices that the males of a bird species vary in the size of their crest feathers. She hypothesizes that crest size is under sexual selection where females prefer males with larger crests. She designs an experiment to test whether crest size is under sexual selection by females. She prepared four treatments: a large male with a large crest, a large male with his crest feathers removed, a small male with a small crest, and a small male with his crest feathers removed. She presents a female with a pair of different males and records the female

Explanation / Answer

There is nothing wrong with this the design of this experiment The experiment does not actually test they proposed hypothesis There are not enough replicates to offset random effects There is experimental bias because there is not enough randomization. i.e the test design should have something to do with testing a female specie with a random combination of equal sized birds with different crest sizes so as to check what sexual selection is made by the female bird.

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