Question

. Green swordtails are sexually dimorphic: males have a long, swordlike projection from their tails, and females have rounded tails. An experimenter decides to perform a female choice experiment. He isolates unmated females with a choice of two mails, each from one of four groups of males. 1) Unmodified control males 2) A second group of males with tails cut off, and re-glued. 3) Males with shortened tails. 4) Males with lengthened tails. a) Imagine the researcher got the following data. Chosen by female # vs group, for each trial. Trials were replicated 20 times Trial Who the Female Chose Group 1 vs. Group 2 Group 1- 10 Group 2- 10 Group 1 vs. Group 3 Group 1- 18 Group 3- 2 Group 1 vs. Group 4 Group 1- 6 Group 4- 14 Group 2 vs. Group 3 Group 2- 16 Group 3- 4 Group 2 vs. Group 4 Group 2- 6 Group 4- 14 Group 3 vs. Group 4 Group 3- 0 Group 4- 20 What might this data indicate, in terms of sexual selection? b) Why might this be the case? c) Go online and research. List three studies of sexual selection, the organism, and their conclusions.

Answer 1

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