Simply, a change to a population’s gene pool. The genetic definition of microevolution is a change in allele frequencies within and among populations, or more PART 1: REVIEWING THE PRINCIPLES OF THE HARDY-WEINBERG THEOREM Black fur in mice There was a mutation in the gene mc1r. It allowed them to camouflage better onto the dark rock to avoid predators. Stephanie Ruiz Jada Smith Sydney Payne Ana Rodriguez Manuele Black fur allowed the pocket mice to adapt better in their environment, where there was a dark lava flow. After watching the film, complete Parts 1‒3 that follow.How does this trait affect the survival of the mice in different environments?Ĭ. What specific trait did researchers’ study in this investigation?ī. (10:25 min)īiointeractive/classroom-resources/making-fittest-natural-selection-and-adaptationĪs you watch, record the following information:Ī. Watch the short film The Making of the Fittest: Natural Selection and Adaptation.Examples of other fitness-related traits that researchers areĬurrently investigating are resistance to the pesticide warfarin in rats, tolerance to heavy metals in plants, and antibiotic In this type of research, investigators try toįind the underlying gene or genes for a given adaptation. Investigating the adaptive value of different coat colors in rock pocket mice is an example of how scientists areĪttempting to connect genotype with phenotype for fitness-related traits. In particular, they were interested in understanding the forces that shape genetic variation Michael Nachman of the University of Arizona and his colleagues have spent many years researching the genetics ofįur color in rock pocket mice. These areas of dark volcanic rock range in age from 1,ĭr. Patches of dark volcanic rocks that formed from cooling lava. Here and there, however, separated by several kilometers of light-colored substrate, are Most of the desert landscape consists of light-Ĭolored sand and granite. Substrate, or surface material, that make up the rocky desert floor. Occur widely in the area-a light-colored variety and a dark-colored variety. Populations of rock pocket mice are found all over the Sonoran Desert in the southwestern United States. What’s so special about this little mouse? Impact on science, however, has been enormous. Rock pocket mouse is 172 millimeters long from its nose to the end of its tail, which is shorter than an average pencil. INTRODUCTION: The tiny rock pocket mouse weighs just 15 grams, about as much as a handful of paper clips. _, _ĪLLELE, GENOTYPE, AND PHENOTYPE FREQUENCIES IN ROCK POCKET MOUSE POPULATIONS Lab 2 Handout – The Making of the Fittest: Natural Selction and Adaptation STAG23AugĪdpated from: HHMI Biointeractive: The Making of the Fittest: Natural Selction and Adaptation
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