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Name: __________________________________________________ Pd: _______ Date:__________Amoeba Sisters “Natural Selection” Video Lecture Worksheet (16 pts)Watch the video on Natural Selection (Amoeba Sisters) then complete this worksheet. The video is 7:22 minutes.What do you think “selected for” means in regards to natural selection? (1 pt) What do you think “selected against” means in regards to natural selection? (1 pt) Populations can have variety, despite being made up of the same species. If a population of the same species has different phenotypes, this can be due to different inherited alleles. The circles below represent organisms of the same species, but they are different patterns based on their inherited alleles. Some of the organisms are have a smaller checkered pattern on their skin, which is a recessive trait, while others have a larger checked pattern, which is a dominant trait. The genotypes of the organisms are shown below. 1036320236947 Hh HH hh 43608661550310038944551587500034971612894102988945397381603375392260 hh hh hh Hh HH258401857582208280053799162971881142ENVIRONMENT0ENVIRONMENTAn allele frequency is the amount of a certain allele (dominant or recessive) in a population at a given time. For example, the dominant allele frequency for the above population is 6. I figured this out by counting all the H’s in the population. The recessive allele frequency is 10 (h’s). Allele frequencies change over time as individuals mate and produce offspring allowing dominant and recessive allele frequencies to change over time in future generations. Using the example above, explain how natural selection could lead to a change in allele frequency in this population of circles. In other words, how will the allele frequencies change in the above population over time and why (in terms of natural selection)? (3 pts)What do you think an “adaptation” is? What does it mean to have an adaptation? (in your own words, please!) (1 pt)How do individuals acquire (“get”) adaptations? _______________________________________ (1 pt)Natural selection is an example of a mechanism of evolution. A “mechanism” is a “way” for evolution to occur. Does this mechanism produce a change in individuals or populations, which are groups of individuals? Explain! (3 pts)What do you think “fitness” means? (in your own words, please!) (1 pt)A major point of understanding natural selection is that not all organisms in a population get to reproduce. Consider the term fitness as used in biology. How does this term relate to natural selection? (3 pts)Based on your answer above, do organisms with higher fitness mean that they have survived to an advanced age? Why or why not? (2 pts) ................
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