BIOL 1001 Lecture Notes - Lecture 16: Seahorse, Sexual Selection, Handicap Principle
13 Jul 2017
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Document Summary
Sexual selection is stronger on the sex that invests. Can be related to reproduction: sexual dimorphism, secondary sexual traits. Variability in fitness is greater in sex that invests less. Meaning males contribute to more production of offspring. Females only produce one offspring and have one partner. Lecture 16- continuation of sexual selection- textbook 85-88, 223-224. Case where most caring is done by males. Results of disparity in investments and certainty of parenting differences between the sexes in sex role reversal: alleles selected for survivorship. Principle that explains that an organisms physical attributes is an indication of their health and fitness. Often produced by carotenoids that are only created by a good diet. Females invest less and males take care of offspring. Risk not promoting the welfare of their genes. Thus an organism that survives and has these traits can still survive. The investment in good diet and sexual attractive performances is risky.
