hhmi biointeractive rock pocket mouse answers

Robert Bost and Richard Cribbs studied a strain of $E. How does this study support the concept that natural selection is not rando… These findings suggest that adaptive dark coloration has occurred at least twice in the rock pocket mouse and that these similar phenotypic changes have different genetic bases. No MC1R mutations were associated with dark fur color in the New Mexico populations. The mutations responsible for the dark fur color in the Arizona mice were absent from the three different populations of New Mexico mice. The entire MC1R gene was sequenced in all 76 of the mice collected. However, the dark-colored mice from the three New Mexico locations were slightly darker than the dark-colored mice from the Arizona population. Nachman and colleagues observed no significant differences in the color of the rocks in the four locations sampled. In a separate study, 76 rock pocket mice were collected from four different, widely separated areas of dark lava rock. Include the following key terms: 'fitness' (or 'fit'), 'survival' (or 'survive'), 'selection' (or 'selective'), and 'evolution' (or 'evolve'). In three to five sentences, explain how this trait increased frequency in the population. All of the above are possible.įor rock pocket mice, which of the following contributes to natural selection favoring dark-colored fur? Write 'yes' for each of the four possible responses: Predators, Genetic mutations, Rock color, Availability of food for the rock pocket mice.Īs you saw in the film, rock pocket mice evolved to have dark-colored fur in certain habitats. The same mutation spontaneously arose in the two different populations. Which of the following could explain this observation? The volcanic rock caused the same mutation in each rock pocket mouse population, resulting in dark fur. The sequence you get is identical to that of a population of pocket mice with dark-colored fur that lives on another rock patch. You take a DNA sample from a member of this population that lives on a known patch of new volcanic rock and determine the DNA sequence of a gene that controls fur color.

Sean Carroll states that 'while mutation is random, natural selection explains how this is not.' In your post-lab, suppose you are studying a recently discovered population of rock pocket mice on volcanic rock.

SOLVED: As you saw in the film, rock pocket mice evolved to have dark-colored fur in certain habitats.

Hhmi biointeractive rock pocket mouse answers