BIO220H1 Lecture Notes - Lecture 17: Natural Selection

• School: UTSG
• Department: Biology
• Course: BIO220H1
• Professor: John Stinchcombe

Document Summary

Lecture 17 bio220: parent-offspring conflict: weighing the benefits and the costs of something, parents and offspring are weighing it differently thus creating a conflict. The cost is the number of future siblings that are given up to benefit to one offspring, and this benefit goes to the gene in the offspring. Consider the provision rate where the cost is divided by 2: natural selection acts to increase the reproductive success of genes. Supplied adults with carotenoids: this increases the potential to breed, the parents will care less, as this will increase the cost of the future offspring, and they will ignore the signals by the current offspring. The offspring were supplied with carotenoids: this increases the intensity of the begging system and signals. Results: supplemented offspring should receive increased provisioning from parents. 75% of the parents that received the carotenoids, went on to breed again, the parents who did not receive the treatment, only 25% went to reproduce.