An allele is defined as a variant of a gene responsible for coding for a specific character. There are two different alleles for each phenotypic characteristics. One allele is dominant while the other form of the allele is recessive. The interaction between the alleles is responsible for showing phenotypic traits. Phenotypic traits are defined as the observable features, such as size, shape, color and many more.

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Answer 1

Question

Chapter 17, Problem 1TY

Summary Introduction

Introduction: An allele is defined as a variant of a gene responsible for coding for a specific character. There are two different alleles for each phenotypic characteristics. One allele is dominant while the other form of the allele is recessive. The interaction between the alleles is responsible for showing phenotypic traits. Phenotypic traits are defined as the observable features, such as size, shape, color and many more.

Expert Solution & Answer

Answer to Problem 1TY

Correct answer: Based on Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1. Hence, the correct answer is option c.

Explanation of Solution

Reason for correct answer:

According to Mendel’s experiment, when two heterozygous plants are crossed in the F₂ generation, each offspring possessing even a single dominant characteristic will express the dominant gene. Of four plants, three plants should express the dominant trait. In the cross-section, only one out of every fourth plant will have both the recessive alleles and will be homozygous recessive. Such plant will express a recessive phenotype. So, the phenotypic ratio of the F₂ generation will be 3:1.

Option c. is given as “3:1”.

According to Mendel’s experiments, in a single factor-cross, the expected phenotype ratio in the F₂ generation is 3:1. Hence, the correct answer is option c.

Reason for incorrect answer:

Option a. is given as “1:2:1”.

The given ratio represents the genotypic ratio obtained in the F₂ generation from a single-factor cross. Hence, option a. is incorrect.

Option b. is given as, “2:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option b. is incorrect.

Option d. is given as “9:3:3:1”.

9:3:3:1 is the expected phenotypic ratio in the F2 generation from a double-factor cross. Hence, option d. is incorrect.

Option e. is given as, “4:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option e. is incorrect.

Hence, the options a., b., d., and e. are incorrect.

Conclusion

According to Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1.

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Answer 2

Question

Chapter 17, Problem 1TY

Summary Introduction

Introduction: An allele is defined as a variant of a gene responsible for coding for a specific character. There are two different alleles for each phenotypic characteristics. One allele is dominant while the other form of the allele is recessive. The interaction between the alleles is responsible for showing phenotypic traits. Phenotypic traits are defined as the observable features, such as size, shape, color and many more.

Expert Solution & Answer

Answer to Problem 1TY

Correct answer: Based on Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1. Hence, the correct answer is option c.

Explanation of Solution

Reason for correct answer:

According to Mendel’s experiment, when two heterozygous plants are crossed in the F₂ generation, each offspring possessing even a single dominant characteristic will express the dominant gene. Of four plants, three plants should express the dominant trait. In the cross-section, only one out of every fourth plant will have both the recessive alleles and will be homozygous recessive. Such plant will express a recessive phenotype. So, the phenotypic ratio of the F₂ generation will be 3:1.

Option c. is given as “3:1”.

According to Mendel’s experiments, in a single factor-cross, the expected phenotype ratio in the F₂ generation is 3:1. Hence, the correct answer is option c.

Reason for incorrect answer:

Option a. is given as “1:2:1”.

The given ratio represents the genotypic ratio obtained in the F₂ generation from a single-factor cross. Hence, option a. is incorrect.

Option b. is given as, “2:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option b. is incorrect.

Option d. is given as “9:3:3:1”.

9:3:3:1 is the expected phenotypic ratio in the F2 generation from a double-factor cross. Hence, option d. is incorrect.

Option e. is given as, “4:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option e. is incorrect.

Hence, the options a., b., d., and e. are incorrect.

Conclusion

According to Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1.

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Answer 3

Question

Chapter 17, Problem 1TY

Summary Introduction

Introduction: An allele is defined as a variant of a gene responsible for coding for a specific character. There are two different alleles for each phenotypic characteristics. One allele is dominant while the other form of the allele is recessive. The interaction between the alleles is responsible for showing phenotypic traits. Phenotypic traits are defined as the observable features, such as size, shape, color and many more.

Expert Solution & Answer

Answer to Problem 1TY

Correct answer: Based on Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1. Hence, the correct answer is option c.

Explanation of Solution

Reason for correct answer:

According to Mendel’s experiment, when two heterozygous plants are crossed in the F₂ generation, each offspring possessing even a single dominant characteristic will express the dominant gene. Of four plants, three plants should express the dominant trait. In the cross-section, only one out of every fourth plant will have both the recessive alleles and will be homozygous recessive. Such plant will express a recessive phenotype. So, the phenotypic ratio of the F₂ generation will be 3:1.

Option c. is given as “3:1”.

According to Mendel’s experiments, in a single factor-cross, the expected phenotype ratio in the F₂ generation is 3:1. Hence, the correct answer is option c.

Reason for incorrect answer:

Option a. is given as “1:2:1”.

The given ratio represents the genotypic ratio obtained in the F₂ generation from a single-factor cross. Hence, option a. is incorrect.

Option b. is given as, “2:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option b. is incorrect.

Option d. is given as “9:3:3:1”.

9:3:3:1 is the expected phenotypic ratio in the F2 generation from a double-factor cross. Hence, option d. is incorrect.

Option e. is given as, “4:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option e. is incorrect.

Hence, the options a., b., d., and e. are incorrect.

Conclusion

According to Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1.

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Answer 4

Question

Chapter 17, Problem 1TY

Summary Introduction

Introduction: An allele is defined as a variant of a gene responsible for coding for a specific character. There are two different alleles for each phenotypic characteristics. One allele is dominant while the other form of the allele is recessive. The interaction between the alleles is responsible for showing phenotypic traits. Phenotypic traits are defined as the observable features, such as size, shape, color and many more.

Expert Solution & Answer

Answer to Problem 1TY

Correct answer: Based on Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1. Hence, the correct answer is option c.

Explanation of Solution

Reason for correct answer:

According to Mendel’s experiment, when two heterozygous plants are crossed in the F₂ generation, each offspring possessing even a single dominant characteristic will express the dominant gene. Of four plants, three plants should express the dominant trait. In the cross-section, only one out of every fourth plant will have both the recessive alleles and will be homozygous recessive. Such plant will express a recessive phenotype. So, the phenotypic ratio of the F₂ generation will be 3:1.

Option c. is given as “3:1”.

According to Mendel’s experiments, in a single factor-cross, the expected phenotype ratio in the F₂ generation is 3:1. Hence, the correct answer is option c.

Reason for incorrect answer:

Option a. is given as “1:2:1”.

The given ratio represents the genotypic ratio obtained in the F₂ generation from a single-factor cross. Hence, option a. is incorrect.

Option b. is given as, “2:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option b. is incorrect.

Option d. is given as “9:3:3:1”.

9:3:3:1 is the expected phenotypic ratio in the F2 generation from a double-factor cross. Hence, option d. is incorrect.

Option e. is given as, “4:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option e. is incorrect.

Hence, the options a., b., d., and e. are incorrect.

Conclusion

According to Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Chapter 17, Problem 1TY

Summary Introduction

Introduction: An allele is defined as a variant of a gene responsible for coding for a specific character. There are two different alleles for each phenotypic characteristics. One allele is dominant while the other form of the allele is recessive. The interaction between the alleles is responsible for showing phenotypic traits. Phenotypic traits are defined as the observable features, such as size, shape, color and many more.

Expert Solution & Answer

Answer to Problem 1TY

Correct answer: Based on Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1. Hence, the correct answer is option c.

Explanation of Solution

Reason for correct answer:

According to Mendel’s experiment, when two heterozygous plants are crossed in the F₂ generation, each offspring possessing even a single dominant characteristic will express the dominant gene. Of four plants, three plants should express the dominant trait. In the cross-section, only one out of every fourth plant will have both the recessive alleles and will be homozygous recessive. Such plant will express a recessive phenotype. So, the phenotypic ratio of the F₂ generation will be 3:1.

Option c. is given as “3:1”.

According to Mendel’s experiments, in a single factor-cross, the expected phenotype ratio in the F₂ generation is 3:1. Hence, the correct answer is option c.

Reason for incorrect answer:

Option a. is given as “1:2:1”.

The given ratio represents the genotypic ratio obtained in the F₂ generation from a single-factor cross. Hence, option a. is incorrect.

Option b. is given as, “2:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option b. is incorrect.

Option d. is given as “9:3:3:1”.

9:3:3:1 is the expected phenotypic ratio in the F2 generation from a double-factor cross. Hence, option d. is incorrect.

Option e. is given as, “4:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option e. is incorrect.

Hence, the options a., b., d., and e. are incorrect.

Conclusion

According to Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1.

Answer 6

Chapter 17, Problem 1TY

Summary Introduction

Introduction: An allele is defined as a variant of a gene responsible for coding for a specific character. There are two different alleles for each phenotypic characteristics. One allele is dominant while the other form of the allele is recessive. The interaction between the alleles is responsible for showing phenotypic traits. Phenotypic traits are defined as the observable features, such as size, shape, color and many more.

Expert Solution & Answer

Answer to Problem 1TY

Correct answer: Based on Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1. Hence, the correct answer is option c.

Explanation of Solution

Reason for correct answer:

According to Mendel’s experiment, when two heterozygous plants are crossed in the F₂ generation, each offspring possessing even a single dominant characteristic will express the dominant gene. Of four plants, three plants should express the dominant trait. In the cross-section, only one out of every fourth plant will have both the recessive alleles and will be homozygous recessive. Such plant will express a recessive phenotype. So, the phenotypic ratio of the F₂ generation will be 3:1.

Option c. is given as “3:1”.

According to Mendel’s experiments, in a single factor-cross, the expected phenotype ratio in the F₂ generation is 3:1. Hence, the correct answer is option c.

Reason for incorrect answer:

Option a. is given as “1:2:1”.

The given ratio represents the genotypic ratio obtained in the F₂ generation from a single-factor cross. Hence, option a. is incorrect.

Option b. is given as, “2:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option b. is incorrect.

Option d. is given as “9:3:3:1”.

9:3:3:1 is the expected phenotypic ratio in the F2 generation from a double-factor cross. Hence, option d. is incorrect.

Option e. is given as, “4:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option e. is incorrect.

Hence, the options a., b., d., and e. are incorrect.

Conclusion

According to Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1.

Answer 7

Chapter 17, Problem 1TY

Summary Introduction

Introduction: An allele is defined as a variant of a gene responsible for coding for a specific character. There are two different alleles for each phenotypic characteristics. One allele is dominant while the other form of the allele is recessive. The interaction between the alleles is responsible for showing phenotypic traits. Phenotypic traits are defined as the observable features, such as size, shape, color and many more.

Answer 8

Expert Solution & Answer

Answer to Problem 1TY

Correct answer: Based on Mendel’s experiments, the expected phenotype ratio in the F₂ generation from a single-factor cross is 3:1. Hence, the correct answer is option c.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Reason for correct answer:

According to Mendel’s experiment, when two heterozygous plants are crossed in the F₂ generation, each offspring possessing even a single dominant characteristic will express the dominant gene. Of four plants, three plants should express the dominant trait. In the cross-section, only one out of every fourth plant will have both the recessive alleles and will be homozygous recessive. Such plant will express a recessive phenotype. So, the phenotypic ratio of the F₂ generation will be 3:1.

Option c. is given as “3:1”.

According to Mendel’s experiments, in a single factor-cross, the expected phenotype ratio in the F₂ generation is 3:1. Hence, the correct answer is option c.

Reason for incorrect answer:

Option a. is given as “1:2:1”.

The given ratio represents the genotypic ratio obtained in the F₂ generation from a single-factor cross. Hence, option a. is incorrect.

Option b. is given as, “2:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option b. is incorrect.

Option d. is given as “9:3:3:1”.

9:3:3:1 is the expected phenotypic ratio in the F2 generation from a double-factor cross. Hence, option d. is incorrect.

Option e. is given as, “4:1”.

In the F₂ generation, the phenotypic ratio obtained is three dominant phenotype expressing plants, including two heterozygous and one homozygous dominant and one recessive phenotype expressing plant. Hence, option e. is incorrect.

Hence, the options a., b., d., and e. are incorrect.