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Genetics and Probability Rules

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Questions and Answers

What is the main purpose of the forked-line method shown in Fig. 1.2.5?

To determine the genotypic ratio of a monohybrid cross

To determine the phenotypic ratio of a dihybrid cross

To determine the genotypic ratio of a dihybrid cross (correct)

To determine the probability of obtaining a specific genotype

What is the genotypic ratio produced by the monohybrid crosses Mm Mm and Nn Nn, according to the text?

1:1

9:3:3:1

3:1

1:2:1 (correct)

What is the main advantage of the Probability Method over the Punnett square and forked-line methods?

It is faster to calculate the genotypic ratio

It is more visually appealing

It can be used to determine the probability of a specific genotype (correct)

It can be used to determine the phenotypic ratio

What is the 'Product Rule of Probability' mentioned in the text?

The chance of two or more independent events to occur together is equal to the product of their individual probabilities. Signup and view all the answers

In the forked-line method shown in Fig. 1.2.5, what is the purpose of branching the three outcomes of gene N to that of gene M in the first column?

To combine the genotypes from the two monohybrid crosses Signup and view all the answers

In the example provided at the end of the text, what is the probability of obtaining an AA genotype from the cross Aa Aa?

1/4 Signup and view all the answers

Which of the following statements about the forked-line method is NOT true?

It requires counting the genotypes, as in the Punnett square Signup and view all the answers

In the forked-line method shown in Fig. 1.2.5, what is the purpose of the first column representing the outcomes of the Mm Mm cross?

To provide the possible genotypes for one of the genes involved in the dihybrid cross Signup and view all the answers

Which of the following is NOT a key advantage of the Probability Method over the Punnett square and forked-line methods?

It allows you to directly calculate the genotypic ratio of a dihybrid cross Signup and view all the answers

Which of the following is NOT a characteristic of the options (distractors) in a well-designed multiple-choice question?

The options should be taken directly from the text Signup and view all the answers