for-another-example-like-the-research-on-collared-lizards-by-templeton-and-colleagues-1990-in-whic-2

Name: for another example like the research on collared lizards by templeton and colleagues 1990 in whic 2
Uploaded: 2020-07-12
Duration: 2 min 59 s
Channel: Numerade
Description: For another example like the research on collared lizards by Templeton and colleagues $(1990),$ in which biologists took advantage of a natural experiment to test predictions about the effect of genetic drift on genetic diversity, see:

Question

For another example like the research on collared lizards by Templeton and colleagues $(1990),$ in which biologists took advantage of a natural experiment to test predictions about the effect of genetic drift on genetic diversity, see:

John Barone · Accepted Answer

experiment that looked at micro evolution. So we&#x27;re looking at change within a population over time. And in the experiment that was described in the chapter, there were two groups of mice. There were control mice which were sedentary mice, and they were simply bread to sort of maintained the the characteristics of the population. And then there was experimental mice, and these were bred to run a lot on the kinds of wheels that you find that Rudin&#x27;s running on little running exercise wheels. And so there were 24 generations, and these mice were selected so that the mice that were the most prone to running we&#x27;re bread with each other and we&#x27;re the ones that were most likely have over time. So this was a selective reading an experiment. And we&#x27;re told in the question, uh, to consider the control group and what we learned from the control group and what the question is sort of asking this. Why have the control group at all? Why not simply compare, um, the mice from the 24th generation in the experiment of group back to the mice in the first generation in the experimental group and the value of having the control, of course, is that it&#x27;s a control thing, right? So, for example, over the course of 24 generations of mice and I imagined this experiment took a few years, lots of things could have changed in the circumstances in which the might find themselves. Maybe there were changes in their cages. Um, maybe there were changes in air conditioning or heating things that the fair menders might not have that really had good control over right. If the power goes out, Ah, or they&#x27;re building gets demolished and they have to move their lab to another building. They have no control over that. Um, maybe there were changes in the food that the mice were being given. And even very conscientious researchers could be unaware that who that they buy actually can change its concentrations of minerals and nutrients and things. Right? So there are all kinds of external factors, right? Controlled variables, as we might think of the that could have changed during the course of the 24 generations. Uh, and so if you just compared to the 24th generation of the first, you may not have seen the effects of these other changes sort of in their entirety lately couldn&#x27;t be parceled out. So by having a control group were able to take these things into consideration. So that&#x27;s the great value of of a control group.

Christina Sorrentino · Answer

Let us complete the following sentence. After looking at the mouse coloration case, study a possible hypothesis to take a better glance at how predators affect natural selection is what snow. Let us go back and determine our hypothesis. After looking at the mouse coloration case, study a possible hypothesis to take a better glance and how predators affect natural selection is. If predators discern color, this may play a role in the natural selection process.

Billy Huggins · Answer

this question sets up a scenario where an evolutionary biologist is studying lizards in Cuba. These lizards seem to be very similar to a group of lizards that are found in the United States in Florida. The question is asking us to come up with some form of explanation for the top of evolution that led to this. So, of course, these air two completely different geographic regions, although something like migration could have been a play here, meaning maybe some lizards from Florida caught a ride on a boat that was headed to Cuba. That supports the possibility. It&#x27;s probably not the full story. Sometimes, in situations like these, we can have what is called convergent evolution. Convergent evolution is when unrelated species evolve similar traits, even though the species live in different parts of the world. And the reason for this is because the regions have very similar ecology, and they have very similar climates. And these two things provide environmental conditions that select for the same types of traits. So basically, that&#x27;s a lot of information. To say what works for a lizard in Florida is the same thing that works for a lizard in Cuba and That&#x27;s because both Cuba and Florida have very similar environmental conditions. And so you end up with two completely different species evolving to be very, very similar because the environmental conditions are so similar and are selecting for those similar traits, which is how he could explain what&#x27;s probably going on here.

Carlene Jimenez · Answer

so the paper referenced here provides some of the first evidence that temperature dependent sex determination is adaptive. Researchers found that the fitness of the Jackie Dragon, which is a lizard native to Australia, was dependent on the temperature that that dragon was incubated in with you it was an egg. Specifically, the fitness for each gender was maximal at the temperature which gave rise to each gender of the lizard.

Sunshine Brosi · Answer

But if we think about this difference that you would have white Mayes on the beach and Brown Mayes, that would be on the mainland in the nearby forest. So you have two different colored mayes. How would this happen if you think about evolution by inheritance of acquired traits that would just predict that the mice and the different environments needed to change colors so they change colors and passed the traits onto their offspring. The theory of evolution by natural selection is not go oriented, but it predicts that the incest riel population varied in color on, and white and brown mice are descendant of them. And it would predict that the white mice had higher fitness in the beach environment. That&#x27;s because because the white mice blended in with a wider color sand and that they were able to avoid predators while four gene So the white mice had higher fitness on the beach and then brown mice point it in the forest environment on the mainland is a matched closer to the leaves of the trees on the phone on the ground, so they were able to avoid predators on the mainland into the their prevalence became stronger there more brown minds on the mainland. So that would be the theory of evolution. Um, the thinking about it in terms of special creation that would just mean that in one area there were white mice created in another area. They were brown mice created.

Problem

We mentioned in Section 7.4 that inbreeding depre…

Problem 17 Easy Difficulty

For another example like the research on collared lizards by Templeton and colleagues $(1990),$ in which biologists took advantage of a natural experiment to test predictions about the effect of genetic drift on genetic diversity, see:

Answer

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