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Ch. 20 - Population Genetics and Evolution at the Population, Species, and Molecular Levels
Sanders - Genetic Analysis: An Integrated Approach 3rd Edition
Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172Not the one you use?Change textbook
Chapter 20, Problem 41b

Put all the candies used in Problem 40 into a single mound and then divide them into four equal piles, this time being sure that the frequency of each color is the same in each pile. Label two of these piles 'male' and the other two 'female.' Half of the group will take one male and one female pile, and the other half of the group will take the other two piles. Each half of the group will carry out its own experiments: Repeat this activity 24 more times, recording the 'genotype' each time.

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Step 1: Combine all the candies from Problem 40 into a single mound. Ensure that the total number of candies and their respective colors are accounted for accurately.
Step 2: Divide the mound into four equal piles, ensuring that the frequency of each color is the same in each pile. This step is crucial to maintain consistency in the experiment.
Step 3: Label two of the piles as 'male' and the other two as 'female.' This labeling will help distinguish the groups for the experiment.
Step 4: Split the participants into two groups. One group will take one male and one female pile, while the other group will take the remaining two piles. This ensures that both groups have equal representation of the candies.
Step 5: Each group will repeat the activity 24 times, recording the 'genotype' each time. This involves observing and documenting the combinations of candy colors in each experiment to analyze patterns or frequencies.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Genotype

Genotype refers to the genetic constitution of an organism, specifically the alleles it possesses for a particular gene. In the context of the experiment, the genotype will determine the traits expressed in the offspring, influenced by the combinations of alleles from the male and female piles. Understanding genotype is crucial for predicting the outcomes of genetic crosses and analyzing inheritance patterns.
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Mendelian Inheritance

Mendelian inheritance is the set of principles that describe how traits are passed from parents to offspring through alleles. It includes concepts such as dominance, segregation, and independent assortment. This framework is essential for interpreting the results of the experiments, as it helps predict the distribution of genotypes and phenotypes in the offspring based on the parental combinations.
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Experimental Design

Experimental design refers to the structured approach used to conduct experiments, ensuring that results are valid and reliable. In this scenario, dividing the candies into equal piles labeled 'male' and 'female' allows for controlled comparisons of genetic outcomes. A well-planned experimental design is vital for minimizing bias and accurately assessing the effects of different genotypes on the results.
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Related Practice
Textbook Question

Divide the contents of a large bag of different-colored candies randomly and approximately equally among the members of the group. Do not pick specific candy colors, but simply empty the contents of the bag onto a table and quickly divide the pile. If you are doing this exercise by yourself, divide the contents of the bag into five piles. Have each person compare the frequencies of each color in they pile with the frequencies in the original bag. Describe any differences in frequency between the pile and the original bag.

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Textbook Question

Divide the contents of a large bag of different-colored candies randomly and approximately equally among the members of the group. Do not pick specific candy colors, but simply empty the contents of the bag onto a table and quickly divide the pile. If you are doing this exercise by yourself, divide the contents of the bag into five piles. Identify what phenomenon explains the observed differences. What evolutionary mechanism do the observations emulate?

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Textbook Question

Put all the candies used in Problem 40 into a single mound and then divide them into four equal piles, this time being sure that the frequency of each color is the same in each pile. Label two of these piles 'male' and the other two 'female.' Half of the group will take one male and one female pile, and the other half of the group will take the other two piles. Each half of the group will carry out its own experiments: Blindly draw one candy from the male pile and one candy from the female pile. Record the colors of the two candies as though they were a genotype. Put the candies back into their respective piles.

400
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Textbook Question

Put all the candies used in Problem 40 into a single mound and then divide them into four equal piles, this time being sure that the frequency of each color is the same in each pile. Label two of these piles 'male' and the other two 'female.' Half of the group will take one male and one female pile, and the other half of the group will take the other two piles. Each half of the group will carry out its own experiments: Determine the frequency of each candy color in the total of 25 draws (a total of 50 candies) and compare these frequencies with the original frequencies of the colors in the pile.

385
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Textbook Question

Put all the candies used in Problem 40 into a single mound and then divide them into four equal piles, this time being sure that the frequency of each color is the same in each pile. Label two of these piles 'male' and the other two 'female.' Half of the group will take one male and one female pile, and the other half of the group will take the other two piles. Each half of the group will carry out its own experiments: Explain any observed differences in frequencies in terms of the evolutionary mechanism the results best emulate.

379
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Textbook Question

Put all the candies used in Problems 41 back into a single mound and then divide them into two piles, being sure that the frequencies of each color are the same in each pile. Make a note of the starting frequency of each color. Label one pile 'male' and the other pile 'female.'

Have one person blindly draw one candy from the male pile and one candy from the female pile. Record the colors as though they were genotypes.

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