5. Which fur color seems to have the greatest overall selective advantage? Use data collected from both dark-colored and light- colored substrates to support your answer. Dark fur color seems to have the greatest selective advantage.

Does fur color provide any selective advantage?

Did fur color provide any selective advantage or disadvantage? Light colored pocket mice were at an advantage because they can hide easier from predators. Dark colored mice on the other hand were at a disadvantage because they were easily exposed to these visual predators.

In which environment is white fur color an advantage for survival?

The white rabbit fur color is an advantageous trait in the arctic habitat for the same reasons as the brown furred rabbits in the equator habitat. The brown rabbits in the arctic habitat are predated upon more frequently by the wolves because they are more visible in the snow.

What advantages does the dark colored mice have over the white colored mice?

Dark-colored mice are less visible to predators. This makes them more fit in this environment and therefore more likely to survive and reproduce. In Arizona, where there are fewer visual predators, there is no selective advantage to light- or dark-colored fur.

What influences the fur color of a mouse and why?

Data from Data Set 2 show that a mouse’s genotype for the MC1R gene affects their fur color. Mice with two copies of allele 2 have the darkest fur. favored in some environments but not in others. alleles that cause dark fur are only high in populations found on dark-colored backgrounds.

Why are some mice light-colored and some nice dark colors?

Rock pocket mice can have either light-colored or dark-colored fur. As shown in the animation, mice that blend in with their surroundings are harder for owls and other predators to see. The dark-colored mouse is more vulnerable to predators in light-colored environments, such as sandy deserts.

What is a selective advantage?

Any characteristic or trait that gives an organism or a genotype greater chances of surviving and reproducing than the available alternatives.

Which color mice are more likely to survive after the forest fire?

Brown mice will be easier for predators to capture. Q. Adaptations are traits that would allow the black mice to survive and reproduce in the post fire environment.

What is the percent advantage of being dark colored for the pocket mouse?

facts. a. Find out how many generations following the first appearance of a dark-colored mutation it would take for 95% of the mice to express the dominant dark-colored phenotype given a 1% advantage (s=0.01).

What caused the difference in fur color in the rock pocket mice?

The illustrations and short film show that there is natural variation of coat color in the population of rock pocket mice living on the lava flow. The short film explains that mutations can cause a change in coat color, and that these genetic changes are being passed on to offspring.

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What environmental change have a selective advantage for one coat color over another?

According to the film, what environmental change gave a selective advantage for one coat color over another? The color of the landscape changed so that some members of the population were more visible to predators than other members were. That is what happened in the film.

What characteristics does natural selection act?

An Introduction to Adaptive Evolution Natural selection only acts on the population’s heritable traits: selecting for beneficial alleles and, thus, increasing their frequency in the population, while selecting against deleterious alleles and, thereby, decreasing their frequency.

Why were there dark-colored mice at location A even though the ground was light-colored?

8. Explain the presence of dark-colored mice at location A. … The dark-colored mice arose in the population at location A by random mutation. The phenotype did not become more common because it did not afford a selective advantage to the mice.

What caused the dark fur to be introduced to the rock pocket mouse population?

Justify your answer in one or two sentences: “The appearance of dark- colored volcanic rock caused the mutation for black fur to appear in the rock pocket mouse population.” … As you saw in the film, rock pocket mice evolved to have dark-colored fur in certain habitats.

What type of an adaptation is fur color in rock pocket mice?

The color change is an example of adaptation. Dark color is an advantage of dark-colored mice over light colored ones at the dark rocks. Because of the dark color, the mice are less visible for predators, so they have better chances for survival.

Is natural selection random?

The genetic variation on which natural selection acts may occur randomly, but natural selection itself is not random at all. The survival and reproductive success of an individual is directly related to the ways its inherited traits function in the context of its local environment.

What is an example of a selective advantage?

The genes that produce these characteristics give them a selective advantage . They may have a better ability to avoid predators, compete for food, or resist disease. … Predation, competition and disease are examples of selection pressures.

What is natural selection examples?

Natural selection is the process in nature by which organisms better adapted to their environment tend to survive and reproduce more than those less adapted to their environment. For example, treefrogs are sometimes eaten by snakes and birds. … This explains the distribution of Gray and Green Treefrogs.

What are selective pressures in natural selection?

Selection pressure means factors that contribute to selection which variations will provide the individual with an increase chance of surviving over others. Because of selective pressures, organisms with certain phenotypes have an advantage when it comes to survival and reproduction. Over time, this leads to evolution.

Does fur color provide any selective advantage or disadvantage explain your answer?

Use data collected from both dark-colored and light- colored substrates to support your answer. Dark fur color seems to have the greatest selective advantage. On the light-colored substrate, 29% of the mice have dark fur, while only 5% of the mice on the dark-colored substrate have light fur.

What color of rock pocket mice fur was an advantage on the lava flows?

The dark-colored mouse has a selective advantage if it is living in a dark-colored habitat such as the Pinacate lava flow. Since rock pocket mice reproduce quickly and often, the frequency of this favored trait would quickly accumulate in the population.

Do mice themselves have a preference for light or dark rocks?

[NARRATOR:] Left to themselves, the mice show no preference for light or dark rocks. It’s the predators that have made the difference. [DR. NACHMAN:] The change in color over evolutionary time in the population is driven by predators weeding out the mice that don’t match their background.

Are there at least two genes involved in creating dark colored mouse fur?

Terms in this set (16) -There are at least two genes involved in creating dark mouse fur. -Under very similar conditions, natural selection can favor very similar adaptations.

How are selection coefficient and natural selection related?

The coefficient of selection is usually taken to be a measure of the extent to which natural selection is acting to reduce the relative contribution of a given genotype to the next generation. If s = 0, the genotype is not selected against at all. …

What is the genotype of the dark colored mice?

Their genotype is dd. The other 19 individuals are dark colored and have either genotype DD or genotype Dd.

Why does the dark fur trait spread so quickly in mice that are on the lava flow?

Why does the dark fur trait spread so quickly in mice that are on the lava flow? Mice with dark fur survive better and can pass on their genes to offspring. … Mice can’t choose/ change the genes given to them, but rather their parents give them genes at random.

Why do dark-colored rock pocket mice on dark lava flows have white fur on their undersides?

Why do dark-colored rock pocket mice on dark lava flows have white bellies? There is no selection for dark bellies by visual predators. There is a reproductive advantage to having a dark belly. White bellies are an important part of camouflage.

What led to the origin of the new dark-colored trait in the mouse population in Arizona?

The volcanic rock caused the same mutation in each rock pocket mouse population, resulting in dark coloration.

What factor influences a mouse's fitness based on fur color in this environment?

The color of a mouse’s fur is affected by the alleles they inherit for the MC1R gene. Mice that have two copies of allele 1 have the lightest fur, those with two copies of allele 2 have the darkest fur, and heterozygotes have intermediate fur color (though it is closer to the dark fur color).

What kind of trait is fur color?

Yellow fur color: a recessive trait – Principles of Biology.

Why did dark colored rock pocket mice first appear in a population of light colored rock pocket mice quizlet?

Why did dark-colored rock pocket mice first appear in a population of light-colored rock pocket mice? They have a genetic mutation that affects their fur color. … -Mutations for advantageous traits are more likely to be passed on to the next generation.