PCB 4674 Lecture Notes - Lecture 18: Antifreeze Protein, Endoplasmic Reticulum, Electric Organ
14 Apr 2018
School
Department
Course
Professor
Document Summary
Seen in many different types of fish in the same general environments. Electric organ is in different locations in the body. Modified muscles: have z lines, thick and thin filaments, sarcoplasmic reticulum, and myosin heads. Different groups of fish have different antifreeze proteins. Fish at opposite poles independently converged on the same type of anti-freeze protein. Association between variation in mating success in one gender and the values of particular traits in that gender. Whichever gender has the steeper relationship between reproductive success and mating success will be the gender in which sexual selection is stronger. Whichever gender invests more per gamete is likely to be the limiting resource for reproduction (object of sexual selection in the other gender) Males invest more in features that attract more matings. Females invest more in features than enhance offspring fitness. Selection produced by competition among individuals of the same gender for successful mating.
