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Different populations of a species of lizard have become adapted to different habitats on three different islands All of the lizards can still interbreed and produc...

Question

Different populations of a species of lizard have become adapted to different habitats on three different islands All of the lizards can still interbreed and produce offspring: You make the following breeding crosses between lizards from the different populations:Cross 1: Population A Population BPopulation A: Adapted to tree trunks Eats flightless insects Brown with long toesPopulation B: Adapted to tree trunks Eats flightless insects Brown with short toesCross 2: Population A Population CPopul

Different populations of a species of lizard have become adapted to different habitats on three different islands All of the lizards can still interbreed and produce offspring: You make the following breeding crosses between lizards from the different populations: Cross 1: Population A Population B Population A: Adapted to tree trunks Eats flightless insects Brown with long toes Population B: Adapted to tree trunks Eats flightless insects Brown with short toes Cross 2: Population A Population C Population A: Adapted to tree trunks Eats flightless insects Brown with long toes Population C: Adapted to tree tops Eats flying insects Blue with short toes Both crosses produce viable; fertile offspring: Which of the two crosses (Cross 1 or Cross 2) do you think is more likely to result in a scenario like reinforcement? Explain your answer:



Answers

Suppose a population of lizards becomes divided into two groups on two different islands after a devastating tsunami. No predators of the lizard are present on one island, and on the other island is a fierce predator that uses the lizard as its primary source of food. Assuming both populations encounter similar environments in every other way, and both survive and grow over the next 100 years, how do you predict any of the characteristics of the two lizard populations to differ at the end of that time? Give specific examples to explain your prediction.
a. The lizards on the island with no predators will likely evolve adaptations such as camouflaged coloration, sharp spines, or toxins to defend against this predator. These adaptations will likely be absent in the other population because they are adapted to other predators.
b. The lizards that survive the fierce predator will likely evolve adaptations such as camouflaged coloration, sharp spines, or toxins to defend against this predator. These adaptations will likely be absent in the other population because they are adapted to other predators.
c. The lizards that survive the fierce predator will likely evolve adaptations such as camouflaged coloration, sharp spines, or toxins to defend against this predator. These adaptations will likely be absent in the other population because this predator is not a factor in their survival.
d. The lizards on the island with no predators will likely evolve adaptations such as camouflaged coloration, sharp spines, or toxins to defend against this predator. These adaptations will likely be absent in the other population because they have survived this predator

Genetic drift is a mechanism for evolution, which occurs under random circumstances or by chance. These random circumstances cause a change in a legal frequency. This particularly occurs in smaller populations, and it's much easier to see in smaller populations. So there are two different examples in which genetic drift can occur. That is thief founder effect and the bottleneck effect. But right now we're just going to focus on the founder effect. So let's say, for example, we have a large population of individuals, and there are two different Gina types and this population. There's upper case, a upper case A and lower case. A lower case. A. Yeah, well, it's too lower Case a lower cases in red. So all the red dots symbolized individuals with the lower case a lower case aging type. And all of the dots and green represent uppercase, uppercase. And during the what happens in the founder effect is some of these individuals get separated from this large population. So, under a chance event, um, some individuals get separated and isolated from this large population. So what we're left with is a much smaller population, and let's say more red individuals get placed in this population compared to green, the green individuals. So in this population, we have, ah, higher frequency off the lower case. A lower case, a genotype. And in this one, we have a larger frequency of the upper case. A uppercase a, um, green individuals. So the founder effect leads to, um, a changed Jane frequency compared toothy, uh, Jane frequency that was seen in the original population.

Hello, everyone. I hope all is well. And today I'll be helping you with the 32nd problem of the Chapter 19 problem set. So 32 is asking what is happening in the population in evolution terms. So you have This is frequency, and what you have are two graphs like the's. So basically, what is happening is this trade is becoming favored. So the metal mouth parts. So let's go through the answers and pick the most sensible one. So you have a inbreeding is occurring, which is false, not operating be genetic drift, which is not agree. You have see gene flow? No, but you have deed. Natural selection. Yes. So natural suction is probably the most prevalent part of this. Um so because it's probably favoring the middle mouth because, um, how certain things in needs. Ah, and uses for it. So I'll be found several, and I'll be a great day. Thank you.

Hello. Every students. So, in this question, you have tow thinking very clearly. And this is total yet experimental part. Suppose you go to the forest and you find salamander species. Okay, so in Salomon that there are generally two types off general types you hit, that is the black color and another risk trade collect. So you go to the forest and found that there are 30 females salamander who just lay their eggs in there. Location. Okay, so you just collect eating and bring into the plastic and get back to the lab. So you have the 30 female geno types on board. You have the general types off each generation. But one thing you remember that you do not have any information about the father off the Childrens. So? Well, the question is that how will you prove that red dominant read salary off. Salomon Air is dominant over black because you do not have any information about that, father. Okay, so what we have to do, you have to examine the colors and the fan. A topic ratio of the colors found in the OB spring off each element. So you have the offspring and you have the female. So you just examine the colors and the fan. A topic ratio. So what you have to do You have toe check the colors and them phenotype pick ratio. Yeah. Okay. So these two factors you have to check. Thank you. So if these two factor gives you a result off three h 21 that means the red color is three. And the black color is one. Yeah, if this observation you caught in your life experiment then on Lee, you can say that read will dominant over the plaque one. Otherwise, you're not because you do not have any father data and you have to perform the each final topic issue off all 30 females and their each 20 to 30 kegs. Okay, so this is a huge calculation on by using computer software. You If you get that this type of ratio for reddish to black, then you can only say that it is


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