During fertilization, two gametes fuse and produce a single cell termed as the zygote. The zygote contains a set of haploid (n) chromosomes from each gamete and thus resulting in the formation of a diploid (2n) set of genetic material. Diploid cells consist of two sets of chromosomes (2n), one derived from the maternal origin and the other derived from the paternal origin. Human cells carry two copies of chromosomes (22 pairs of autosomes) and a single pair of sex chromosomes.

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Answer 1

Question

Chapter 6, Problem 1TQ

Summary Introduction

During fertilization, two gametes fuse and produce a single cell termed as the zygote. The zygote contains a set of haploid (n) chromosomes from each gamete and thus resulting in the formation of a diploid (2n) set of genetic material. Diploid cells consist of two sets of chromosomes (2n), one derived from the maternal origin and the other derived from the paternal origin. Human cells carry two copies of chromosomes (22 pairs of autosomes) and a single pair of sex chromosomes.

Expert Solution & Answer

Answer to Problem 1TQ

Homologous chromosomes contain a pair of similar kind of chromosomes; each chromosome inherited from each parent (one from maternal and one from paternal). Therefore, option b is correct.

Explanation of Solution

Justify the reasons for the correct statement:

Each homologous pair of chromosomes present in the zygote contains a set of chromosomes, one derived from the mother and another from the father. The human genome contains twenty three (23) pairs of chromosomes. Homologous chromosomes carry a similar kind of genetic information in their corresponding loci. All pairs (22 pairs) of chromosomes carry the same genes or genetic information except X and Y chromosomes. The X and Y chromosomes are known as sex chromosomes and they are involved in the determination of sexual characteristics in human beings. The remaining 22 pairs of homologous chromosomes are called autosomes.

The homologous pair of chromosomes found to be similar according to their size, physical character, pattern, and gene content. Homologous chromosomes carry two forms of a gene in the same locus are called alleles (same gene but different alleles).

Option (b) is given as, “a pair of chromosomes of the same kind”.

Hence, the option (b) is correct.

Justify the reasons for the incorrect statements:

Option (a) is given as, “the same thing as sister chromatids”.

Two identical DNA molecules after replication are known as sister chromatids. These chromatids are attached at the centromere until metaphase of the cell cycle. When sister chromatids are attached, it will be considered as a single chromosome. Hence, it is a wrong answer.

Option (c) is given as, “identical copies of the same chromosome”.

Two identical DNA copies of the same chromosome are known as sister chromatids. Hence, it is a wrong answer.

Option (d) is given as, “always haploid”.

A single set of chromosomes is known as a haploid. Hence, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

The homologous chromosomes are a pair of a same kind of chromosomes. They are inherited from the parents, one from the mother and another from the father.

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Question #3: In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming there was just one gene conferring gametophytic obligate apomixis, and that the two parents are inbreds, what would be the consequences of such a cross if: a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the parental cross. b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the…

Question #5: Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The genes show independent assortment. Recessive alleles at both loci are required for the facultative apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C. At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype. A facultative apomict male, capable of producing viable pollen, was crossed with a sexually reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following temperatures*: a) 15°C? b) 25°C? *for full credit, show crosses and genotypes where appropriate. Remember to position the female first (left side) in the cross. Type your answer here:

Answer 2

Question

Chapter 6, Problem 1TQ

Summary Introduction

During fertilization, two gametes fuse and produce a single cell termed as the zygote. The zygote contains a set of haploid (n) chromosomes from each gamete and thus resulting in the formation of a diploid (2n) set of genetic material. Diploid cells consist of two sets of chromosomes (2n), one derived from the maternal origin and the other derived from the paternal origin. Human cells carry two copies of chromosomes (22 pairs of autosomes) and a single pair of sex chromosomes.

Expert Solution & Answer

Answer to Problem 1TQ

Homologous chromosomes contain a pair of similar kind of chromosomes; each chromosome inherited from each parent (one from maternal and one from paternal). Therefore, option b is correct.

Explanation of Solution

Justify the reasons for the correct statement:

Each homologous pair of chromosomes present in the zygote contains a set of chromosomes, one derived from the mother and another from the father. The human genome contains twenty three (23) pairs of chromosomes. Homologous chromosomes carry a similar kind of genetic information in their corresponding loci. All pairs (22 pairs) of chromosomes carry the same genes or genetic information except X and Y chromosomes. The X and Y chromosomes are known as sex chromosomes and they are involved in the determination of sexual characteristics in human beings. The remaining 22 pairs of homologous chromosomes are called autosomes.

The homologous pair of chromosomes found to be similar according to their size, physical character, pattern, and gene content. Homologous chromosomes carry two forms of a gene in the same locus are called alleles (same gene but different alleles).

Option (b) is given as, “a pair of chromosomes of the same kind”.

Hence, the option (b) is correct.

Justify the reasons for the incorrect statements:

Option (a) is given as, “the same thing as sister chromatids”.

Two identical DNA molecules after replication are known as sister chromatids. These chromatids are attached at the centromere until metaphase of the cell cycle. When sister chromatids are attached, it will be considered as a single chromosome. Hence, it is a wrong answer.

Option (c) is given as, “identical copies of the same chromosome”.

Two identical DNA copies of the same chromosome are known as sister chromatids. Hence, it is a wrong answer.

Option (d) is given as, “always haploid”.

A single set of chromosomes is known as a haploid. Hence, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

The homologous chromosomes are a pair of a same kind of chromosomes. They are inherited from the parents, one from the mother and another from the father.

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Answer 3

Question

Chapter 6, Problem 1TQ

Summary Introduction

During fertilization, two gametes fuse and produce a single cell termed as the zygote. The zygote contains a set of haploid (n) chromosomes from each gamete and thus resulting in the formation of a diploid (2n) set of genetic material. Diploid cells consist of two sets of chromosomes (2n), one derived from the maternal origin and the other derived from the paternal origin. Human cells carry two copies of chromosomes (22 pairs of autosomes) and a single pair of sex chromosomes.

Expert Solution & Answer

Answer to Problem 1TQ

Homologous chromosomes contain a pair of similar kind of chromosomes; each chromosome inherited from each parent (one from maternal and one from paternal). Therefore, option b is correct.

Explanation of Solution

Justify the reasons for the correct statement:

Each homologous pair of chromosomes present in the zygote contains a set of chromosomes, one derived from the mother and another from the father. The human genome contains twenty three (23) pairs of chromosomes. Homologous chromosomes carry a similar kind of genetic information in their corresponding loci. All pairs (22 pairs) of chromosomes carry the same genes or genetic information except X and Y chromosomes. The X and Y chromosomes are known as sex chromosomes and they are involved in the determination of sexual characteristics in human beings. The remaining 22 pairs of homologous chromosomes are called autosomes.

The homologous pair of chromosomes found to be similar according to their size, physical character, pattern, and gene content. Homologous chromosomes carry two forms of a gene in the same locus are called alleles (same gene but different alleles).

Option (b) is given as, “a pair of chromosomes of the same kind”.

Hence, the option (b) is correct.

Justify the reasons for the incorrect statements:

Option (a) is given as, “the same thing as sister chromatids”.

Two identical DNA molecules after replication are known as sister chromatids. These chromatids are attached at the centromere until metaphase of the cell cycle. When sister chromatids are attached, it will be considered as a single chromosome. Hence, it is a wrong answer.

Option (c) is given as, “identical copies of the same chromosome”.

Two identical DNA copies of the same chromosome are known as sister chromatids. Hence, it is a wrong answer.

Option (d) is given as, “always haploid”.

A single set of chromosomes is known as a haploid. Hence, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

The homologous chromosomes are a pair of a same kind of chromosomes. They are inherited from the parents, one from the mother and another from the father.

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Answer 4

Question

Chapter 6, Problem 1TQ

Summary Introduction

During fertilization, two gametes fuse and produce a single cell termed as the zygote. The zygote contains a set of haploid (n) chromosomes from each gamete and thus resulting in the formation of a diploid (2n) set of genetic material. Diploid cells consist of two sets of chromosomes (2n), one derived from the maternal origin and the other derived from the paternal origin. Human cells carry two copies of chromosomes (22 pairs of autosomes) and a single pair of sex chromosomes.

Expert Solution & Answer

Answer to Problem 1TQ

Homologous chromosomes contain a pair of similar kind of chromosomes; each chromosome inherited from each parent (one from maternal and one from paternal). Therefore, option b is correct.

Explanation of Solution

Justify the reasons for the correct statement:

Each homologous pair of chromosomes present in the zygote contains a set of chromosomes, one derived from the mother and another from the father. The human genome contains twenty three (23) pairs of chromosomes. Homologous chromosomes carry a similar kind of genetic information in their corresponding loci. All pairs (22 pairs) of chromosomes carry the same genes or genetic information except X and Y chromosomes. The X and Y chromosomes are known as sex chromosomes and they are involved in the determination of sexual characteristics in human beings. The remaining 22 pairs of homologous chromosomes are called autosomes.

The homologous pair of chromosomes found to be similar according to their size, physical character, pattern, and gene content. Homologous chromosomes carry two forms of a gene in the same locus are called alleles (same gene but different alleles).

Option (b) is given as, “a pair of chromosomes of the same kind”.

Hence, the option (b) is correct.

Justify the reasons for the incorrect statements:

Option (a) is given as, “the same thing as sister chromatids”.

Two identical DNA molecules after replication are known as sister chromatids. These chromatids are attached at the centromere until metaphase of the cell cycle. When sister chromatids are attached, it will be considered as a single chromosome. Hence, it is a wrong answer.

Option (c) is given as, “identical copies of the same chromosome”.

Two identical DNA copies of the same chromosome are known as sister chromatids. Hence, it is a wrong answer.

Option (d) is given as, “always haploid”.

A single set of chromosomes is known as a haploid. Hence, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

The homologous chromosomes are a pair of a same kind of chromosomes. They are inherited from the parents, one from the mother and another from the father.

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

Answer 5

Chapter 6, Problem 1TQ

Summary Introduction

During fertilization, two gametes fuse and produce a single cell termed as the zygote. The zygote contains a set of haploid (n) chromosomes from each gamete and thus resulting in the formation of a diploid (2n) set of genetic material. Diploid cells consist of two sets of chromosomes (2n), one derived from the maternal origin and the other derived from the paternal origin. Human cells carry two copies of chromosomes (22 pairs of autosomes) and a single pair of sex chromosomes.

Expert Solution & Answer

Answer to Problem 1TQ

Homologous chromosomes contain a pair of similar kind of chromosomes; each chromosome inherited from each parent (one from maternal and one from paternal). Therefore, option b is correct.

Explanation of Solution

Justify the reasons for the correct statement:

Each homologous pair of chromosomes present in the zygote contains a set of chromosomes, one derived from the mother and another from the father. The human genome contains twenty three (23) pairs of chromosomes. Homologous chromosomes carry a similar kind of genetic information in their corresponding loci. All pairs (22 pairs) of chromosomes carry the same genes or genetic information except X and Y chromosomes. The X and Y chromosomes are known as sex chromosomes and they are involved in the determination of sexual characteristics in human beings. The remaining 22 pairs of homologous chromosomes are called autosomes.

The homologous pair of chromosomes found to be similar according to their size, physical character, pattern, and gene content. Homologous chromosomes carry two forms of a gene in the same locus are called alleles (same gene but different alleles).

Option (b) is given as, “a pair of chromosomes of the same kind”.

Hence, the option (b) is correct.

Justify the reasons for the incorrect statements:

Option (a) is given as, “the same thing as sister chromatids”.

Two identical DNA molecules after replication are known as sister chromatids. These chromatids are attached at the centromere until metaphase of the cell cycle. When sister chromatids are attached, it will be considered as a single chromosome. Hence, it is a wrong answer.

Option (c) is given as, “identical copies of the same chromosome”.

Two identical DNA copies of the same chromosome are known as sister chromatids. Hence, it is a wrong answer.

Option (d) is given as, “always haploid”.

A single set of chromosomes is known as a haploid. Hence, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

The homologous chromosomes are a pair of a same kind of chromosomes. They are inherited from the parents, one from the mother and another from the father.

Answer 6

Chapter 6, Problem 1TQ

Summary Introduction

During fertilization, two gametes fuse and produce a single cell termed as the zygote. The zygote contains a set of haploid (n) chromosomes from each gamete and thus resulting in the formation of a diploid (2n) set of genetic material. Diploid cells consist of two sets of chromosomes (2n), one derived from the maternal origin and the other derived from the paternal origin. Human cells carry two copies of chromosomes (22 pairs of autosomes) and a single pair of sex chromosomes.

Expert Solution & Answer

Answer to Problem 1TQ

Homologous chromosomes contain a pair of similar kind of chromosomes; each chromosome inherited from each parent (one from maternal and one from paternal). Therefore, option b is correct.

Explanation of Solution

Justify the reasons for the correct statement:

Each homologous pair of chromosomes present in the zygote contains a set of chromosomes, one derived from the mother and another from the father. The human genome contains twenty three (23) pairs of chromosomes. Homologous chromosomes carry a similar kind of genetic information in their corresponding loci. All pairs (22 pairs) of chromosomes carry the same genes or genetic information except X and Y chromosomes. The X and Y chromosomes are known as sex chromosomes and they are involved in the determination of sexual characteristics in human beings. The remaining 22 pairs of homologous chromosomes are called autosomes.

The homologous pair of chromosomes found to be similar according to their size, physical character, pattern, and gene content. Homologous chromosomes carry two forms of a gene in the same locus are called alleles (same gene but different alleles).

Option (b) is given as, “a pair of chromosomes of the same kind”.

Hence, the option (b) is correct.

Justify the reasons for the incorrect statements:

Option (a) is given as, “the same thing as sister chromatids”.

Two identical DNA molecules after replication are known as sister chromatids. These chromatids are attached at the centromere until metaphase of the cell cycle. When sister chromatids are attached, it will be considered as a single chromosome. Hence, it is a wrong answer.

Option (c) is given as, “identical copies of the same chromosome”.

Two identical DNA copies of the same chromosome are known as sister chromatids. Hence, it is a wrong answer.

Option (d) is given as, “always haploid”.

A single set of chromosomes is known as a haploid. Hence, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

The homologous chromosomes are a pair of a same kind of chromosomes. They are inherited from the parents, one from the mother and another from the father.

Answer 7

Chapter 6, Problem 1TQ

Summary Introduction

During fertilization, two gametes fuse and produce a single cell termed as the zygote. The zygote contains a set of haploid (n) chromosomes from each gamete and thus resulting in the formation of a diploid (2n) set of genetic material. Diploid cells consist of two sets of chromosomes (2n), one derived from the maternal origin and the other derived from the paternal origin. Human cells carry two copies of chromosomes (22 pairs of autosomes) and a single pair of sex chromosomes.

Answer 8

Expert Solution & Answer

Answer to Problem 1TQ

Homologous chromosomes contain a pair of similar kind of chromosomes; each chromosome inherited from each parent (one from maternal and one from paternal). Therefore, option b is correct.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Justify the reasons for the correct statement:

Each homologous pair of chromosomes present in the zygote contains a set of chromosomes, one derived from the mother and another from the father. The human genome contains twenty three (23) pairs of chromosomes. Homologous chromosomes carry a similar kind of genetic information in their corresponding loci. All pairs (22 pairs) of chromosomes carry the same genes or genetic information except X and Y chromosomes. The X and Y chromosomes are known as sex chromosomes and they are involved in the determination of sexual characteristics in human beings. The remaining 22 pairs of homologous chromosomes are called autosomes.

The homologous pair of chromosomes found to be similar according to their size, physical character, pattern, and gene content. Homologous chromosomes carry two forms of a gene in the same locus are called alleles (same gene but different alleles).

Option (b) is given as, “a pair of chromosomes of the same kind”.

Hence, the option (b) is correct.

Justify the reasons for the incorrect statements:

Option (a) is given as, “the same thing as sister chromatids”.

Two identical DNA molecules after replication are known as sister chromatids. These chromatids are attached at the centromere until metaphase of the cell cycle. When sister chromatids are attached, it will be considered as a single chromosome. Hence, it is a wrong answer.

Option (c) is given as, “identical copies of the same chromosome”.

Two identical DNA copies of the same chromosome are known as sister chromatids. Hence, it is a wrong answer.

Option (d) is given as, “always haploid”.

A single set of chromosomes is known as a haploid. Hence, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Answer 12

Conclusion

The homologous chromosomes are a pair of a same kind of chromosomes. They are inherited from the parents, one from the mother and another from the father.

Answer 13

Ch. 6 - Prob. 1TQ Ch. 6 - Prob. 2TQ Ch. 6 - Prob. 3TQ Ch. 6 - Prob. 4TQ Ch. 6 - Prob. 5TQ Ch. 6 - Prob. 6TQ Ch. 6 - Prob. 7TQ Ch. 6 - Prob. 8TQ Ch. 6 - Prob. 9TQ Ch. 6 - Prob. 10TQ

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