Stem cells are sometimes referred to as “undifferentiated” due to this maintenance of proliferative properties. ted cell type. 

TLS Online TPP Program

#Id: 9565

#Unit 11. Evolution and Behavior

Haldane’s rule: Hybrid sterility or hybrid inviability is often limited to the heterogametic sex. 

TLS Online TPP Program

#Id: 9566

#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: 9567

#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: 9568

#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: 9569

#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: 9570

#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.