When a population is in Hardy-Weinberg equilibrium, the genotypic frequencies are determined by the allelic  frequencies.

TLS Online TPP Program

#Id: 4694

#Unit 11. Evolution and Behavior

An individual carrying the allele can pass copies of it to his or her own children. This is the allele’s direct fitness. The allele can also pass extra copies of itself to the next generation as the result of the increased fitness of relatives that benefit from the altruistic individual’s actions. This is the allele’s indirect fitness. 

TLS Online TPP Program

#Id: 4667

#Unit 13. Methods in Biology

Scatchard plots are based on repeated equilibrium dialyses with a constant concentration of antibody and varying concentration of ligand. 

If all antibodies have the same affinity, then a Scatchard plot yields a straight line with a slope of Ka. The x intercept is n, the valency of the antibody, which is 2 for IgG and other divalent Igs. For IgM, which is pentameric, n  10, and for dimeric IgA, n  4. In this graph, antibody #1 has a higher affinity than antibody #2. .  

TLS Online TPP Program

#Id: 10446

#Unit 4. Cell Communication and Cell Signaling

Rous sarcoma virus is a retrovirus whose RNA genome is reverse transcribed into DNA, which is incorporated into the host-cell genome

TLS Online TPP Program

#Id: 4480

#Unit 13. Methods in Biology

Histological samples are often stained with hematoxylin and eosin (“H&E stain”).

TLS Online TPP Program

#Id: 10323

#Unit 4. Cell Communication and Cell Signaling