Principal signaling receptor for Wnt proteins is Frizzled (Fz), which contains seven transmembrane α helices.

TLS Online TPP Program

#Id: 4309

#Unit 11. Evolution and Behavior

Hamilton’s rule: It states that an allele that causes an altruistic behavior will spread if the following condition is met (rb>C)

TLS Online TPP Program

#Id: 4310

#Unit 11. Evolution and Behavior

Cope’s rule: A proposed generalization that individual body size in animals tends to increase during evolution.

TLS Online TPP Program

#Id: 4311

#Unit 11. Evolution and Behavior

Hitchhiking: Change in the frequency of an allele due to linkage with a selected allele at another locus.

TLS Online TPP Program

#Id: 4312

#Unit 11. Evolution and Behavior

Dollo’s law: A biological generalization positing that complex characters, once lost in evolution, are extremely unlikely to reappear and thus the loss of complex characters is virtually always irreversible.

TLS Online TPP Program

#Id: 4313

#Unit 11. Evolution and Behavior

Van Valen law- he found a surprising result: rather straight curves, implying that the probability of extinction is roughly constant.

TLS Online TPP Program

#Id: 4314

#Unit 11. Evolution and Behavior

Ockham’s principle- Principle of parsimony