Question

Part B - How does this research relate to your biology course? The following graph shows the frequency distribution of a heritable trait -- fur color -- in a hypothetical deer mouse population. The x-axis represents variation in fur color from light to dark. The y-axis represents the percentage of individuals in the population with each particular color of fur. 333 There are three ways in which natural selection can alter the frequency distribution of a heritable trait, such as fur color, in a population: • disruptive selection • stabilizing selection • directional selection In this activity, you will define what each type of selection does and identify an example of each. For the modes of selection, drag one graph, one description, and one example to each bin. Reset Help ДА СЛЕ Mexican spadefoot toad tadpoles with rounded bodies are successful as omnivores, while those with narrow bodies are successful as carnivores. Intermediate types are not as successful. A. carolinensis populations evolved larger toepad size and more lamellae following the introduction of A. Sagrer. Tends to favor the mean value for the trait and to decrease genetic variation in the population. Starlings that lay five eggs in a clutch tend to have greater reproductive success than those that lay a larger or smaller number of eggs in a clutch. May either increase or decrease the mean value for the trait, shifting the distribution of genetic variation in the population toward one extreme or the other. Tends to favor extreme values for the trait and to increase genetic variation in the population. Disruptive selection Stabilizing selection Directional selection

Answer 1

Sol.

Mode of selection,example and description can be dragged into bin as follows:

	Disruptive selection	Stabilizing selection	Directional selection
Definition of the mode of selection	Tends to favor extreme values for the trait and to increase genetic variation in the population.	Tends to favor the mean value for the trait and to decrease genetic variation in the population.	May either increase or decrease the mean value for the trait, shifting the distribution of the genetic variation in the population toward one extreme or the other.
Description of the mode of selection	Mexican spadefoot toad tadpoles with rounded bodies are successful as omnivores, while those with narrow bodies are successful as carnivores.Intermediate types are not as successful.	Starlings that lay five eggs in a clutch tend to have greater reproductive success than those that lay a smaller or larger number of eggs in a clutch.	A carolinesis population evolved larger toepad size and more lamelle following the introduction of A.sagrie
Example of the mode of selection	First graph given in the question is showing disruptive selection where mouse having light and dark coloured fur have been selected.	Second graph given in the question is showing stabilizing selection where mouse having intermediate coloured fur have been selected.	Third graph given in the question is showing directional selection where mouse having either light or dark coloured fur have been selected.