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Home  arrow Chapter 3  arrow Post-quiz: 3.2 Independent Assortment

Post-quiz: 3.2 Independent Assortment

For the information necessary in completing this quiz, refer to Web Tutorial 3.2 Independent Assortment and Section 3.3 Mendel’s Dihybrid Cross Generated a Unique F2 Ratio in your textbook.

This activity contains 10 questions.

Question 1.
In the following test cross [AaBb X aabb], what are the dimensions of the Punnett square used to determine the genotypes of the next generation?


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Question 2.
What genotype is present most often among the progeny (F2) of a dihybrid cross (AaBb X AaBb)?


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Question 3.
In the F1 dihybrid cross (WwGg X WwGg), what is the probability of obtaining an individual that is round, green, and true-breeding? (G = Yellow seed, g = green seed; W = round seed, w = wrinkled)


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Question 4.
How many different types of gametes can be formed by individuals of the genotype AaBbcc?


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Question 5.
How many different types of gametes can be formed by individuals of the genotype AaBB?


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Question 6.
A pea plant that is true breeding (homozygous) for green round seeds is crossed with a plant that has yellow wrinkled seeds. The F1 progeny all have round green seeds. Predict the results of test crossing these F1 plants.


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Question 7.
In the following list of genotypes, how many are examples of heterozygosity, and which ones are they?

AA, Aa, Gg, bb, BB, Bb, GG, Ww, ww, aa


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Question 8.
Using the forked line method, determine the phenotypic ratios of the trihybrid cross AaBbCc X AaBBCC. What proportion of the progeny have the dominant phenotype for A, B, and C?


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Question 9.
Using the forked line method, determine the phenotypic ratios of the trihybrid cross AaBbCc X AaBBCC. What proportion of the progeny are aaBBCC?


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Question 10.
Using the forked line method, determine the phenotypic ratios of the trihybrid cross AaBbCc X AaBBCC. What proportion of the progeny are homozygous recessive at all loci?


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