Numerous studies, mostly in mutant organisms, have demonstrated that the period of a biological rhythm is...

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Psychology

Numerous studies, mostly in mutant organisms, have demonstratedthat the period of a biological rhythm is an inherited trait.Describe some of the studies, or propose studies (include animalstudies) that would help determine the inheritance of the period ofa biological rhythm.

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STUDY 1 Biological Rhythms of the Mouse Stephan Steinlechner in The Laboratory Mouse Second Edition 2012 Biological rhythms are a universal feature of all organisms This chapter gives an overview of rhythmic functions in the mouse with a special emphasis on the circadian 24 h rhythms The physiology and behaviour of the mouse are temporally organized in a programme that allows anticipation of the daily light and dark cycle rather than simply reacting to this recurrent change The molecular mechanisms underlying the mammalian circadian clock have been defined primarily through studies involving mice with either mutations or deletions that led to aberrant rhythmic phenotypes It turns out that the mammalian circadian system is organized in a hierarchy of oscillators The master clock localized in the suprachiasmatic nuclei of the anterior hypothalamus coordinates independent peripheral oscillators in all major organs and their coordinated action appears indispensable for a healthy organism The cellautonomous selfsustained rhythms are based on transcriptionaltranslational feedback loops driving expression patterns of a number of clock genes and clockcontrolled genes STUDY 2 Environmental Relations and Behavior Horst O Schwassmann in Fish Physiology 1971 Biological rhythms of daily tidal lunar and annual periodicity which are an inherent feature of organismic organization are recognized as adaptations to our periodically changing environment Considering the experimental evidence it is obvious that rhythmic phenomena in many species of fish are in no way different from those known in other organisms regarding the endogenous nature and the control of phase and period by periodic environmental variables Therefore certain See Answer

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