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Sex Determination Processes: The mechanisms by which the Sex of an individual's Gonads are fixed.

Sexual Selection and Mate Choice- Concept

JoVE 10615

Choosing Mates

Evolutionary fitness is largely determined by the ability of an organism to survive and successfully produce offspring. Critical to this process is sexual selection, which plays a large role in the determination of mating pairs, and thus which genes are passed on to the next generation. Often, intense competition for mates within a population places selective…

 Lab Bio

Genetics of Organisms- Concept

JoVE 10557

Mendelian Genetics

Evolution is caused by changes in the genetic composition of populations. In the field of population genetics, scientists model this process as changes in the frequency of alleles at individual genetic loci. This simple representation of how evolution occurs dates to Gregor Mendel’s analysis of trait inheritance patterns in pea plants, first presented in 1865.…

 Lab Bio

Abdominal Exam II: Percussion

JoVE 10090

Source: Alexander Goldfarb, MD, Assistant Professor of Medicine, Beth Israel Deaconess Medical Center, MA


Medical percussion is based on the difference in pitch between the sounds elicited by tapping on the body wall. The auditory response to tapping depends on the ease with which the body wall vibrates, and is influenced by underlying…

 Physical Examinations II

Data Acquisition and Analysis In Brainstem Evoked Response Audiometry In Mice

1Experimental Neuropsychopharmacology, Federal Institute for Drugs and Medical Devices, 2KBRwyle GmbH, 3Cognitive Neurophysiology, Department of Psychiatry and Psychotherapy, Faculty of Medicine, University of Cologne, 4Molecular and Cellular Cognition, German Center for Neurodegenerative Diseases (DZNE), 5Institute of Neurophysiology, Faculty of Medicine, University of Cologne, 6Federal Institute for Drugs and Medical Devices (BfArM), 7Thescon GmbH

JoVE 59200

 Neuroscience
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