The developing embryo, which starts to develop from a flat sheet of cells, grows to acquire a typical cylindrical shape which takes place through the process of characteristic embryonic folding. The embryo begins to fold laterally and then folds at both the ends, forming a distinct C-shape with a distinct head and tail end.

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Answer 1

Question

Chapter 29, Problem 1RAC

Summary Introduction

Introduction:

The developing embryo, which starts to develop from a flat sheet of cells, grows to acquire a typical cylindrical shape which takes place through the process of characteristic embryonic folding. The embryo begins to fold laterally and then folds at both the ends, forming a distinct C-shape with a distinct head and tail end.

Expert Solution & Answer

Answer to Problem 1RAC

The correct answer is option (b) weeks 3-8 of development.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) weeks 3-8 of development. The major organ system development takes place during the 5^th week of embryonic development. The neural tube starts forming, and the embryo is surrounded by amniotic fluid. The major organ system like the nervous system (brain and spinal cord) and heart are formed. So, the correct answer is option (b).

Explanation for incorrect answer:

Option (a) week 1 and 2 of development. The major organ system is not developed during 1^st and 2^nd week, as the zygote gets implanted during the first two weeks and forms embryonic and placental structures. So, this is an incorrect option.

Option (c) weeks 8-20 of development. During 8-20 weeks of development most of the organ systems have been formed, and the nerve centers start forming senses through rapid brain growth. The layers of skin also start to form. So, this is an incorrect answer.

Option (d) the last 30 weeks of development. During last 30 weeks of development the brain of the fetus is still growing, and the red blood cells start to form in the bone marrow, and the bones also start to harden. So, this is an incorrect answer.

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The shape of radishes may be long (SL/SL), oval (SL/SS), or round (SS/SS), and the color of radishes may be red (CR/CR), purple (CR/CW) or white (CW/CW). If a long, red radish plant is crossed with a round, white plant, what will be the appearance of the F1 and F2 generations?

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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…

Answer 2

Question

Chapter 29, Problem 1RAC

Summary Introduction

Introduction:

The developing embryo, which starts to develop from a flat sheet of cells, grows to acquire a typical cylindrical shape which takes place through the process of characteristic embryonic folding. The embryo begins to fold laterally and then folds at both the ends, forming a distinct C-shape with a distinct head and tail end.

Expert Solution & Answer

Answer to Problem 1RAC

The correct answer is option (b) weeks 3-8 of development.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) weeks 3-8 of development. The major organ system development takes place during the 5^th week of embryonic development. The neural tube starts forming, and the embryo is surrounded by amniotic fluid. The major organ system like the nervous system (brain and spinal cord) and heart are formed. So, the correct answer is option (b).

Explanation for incorrect answer:

Option (a) week 1 and 2 of development. The major organ system is not developed during 1^st and 2^nd week, as the zygote gets implanted during the first two weeks and forms embryonic and placental structures. So, this is an incorrect option.

Option (c) weeks 8-20 of development. During 8-20 weeks of development most of the organ systems have been formed, and the nerve centers start forming senses through rapid brain growth. The layers of skin also start to form. So, this is an incorrect answer.

Option (d) the last 30 weeks of development. During last 30 weeks of development the brain of the fetus is still growing, and the red blood cells start to form in the bone marrow, and the bones also start to harden. So, this is an incorrect answer.

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Answer 3

Question

Chapter 29, Problem 1RAC

Summary Introduction

Introduction:

The developing embryo, which starts to develop from a flat sheet of cells, grows to acquire a typical cylindrical shape which takes place through the process of characteristic embryonic folding. The embryo begins to fold laterally and then folds at both the ends, forming a distinct C-shape with a distinct head and tail end.

Expert Solution & Answer

Answer to Problem 1RAC

The correct answer is option (b) weeks 3-8 of development.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) weeks 3-8 of development. The major organ system development takes place during the 5^th week of embryonic development. The neural tube starts forming, and the embryo is surrounded by amniotic fluid. The major organ system like the nervous system (brain and spinal cord) and heart are formed. So, the correct answer is option (b).

Explanation for incorrect answer:

Option (a) week 1 and 2 of development. The major organ system is not developed during 1^st and 2^nd week, as the zygote gets implanted during the first two weeks and forms embryonic and placental structures. So, this is an incorrect option.

Option (c) weeks 8-20 of development. During 8-20 weeks of development most of the organ systems have been formed, and the nerve centers start forming senses through rapid brain growth. The layers of skin also start to form. So, this is an incorrect answer.

Option (d) the last 30 weeks of development. During last 30 weeks of development the brain of the fetus is still growing, and the red blood cells start to form in the bone marrow, and the bones also start to harden. So, this is an incorrect answer.

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Answer 4

Question

Chapter 29, Problem 1RAC

Summary Introduction

Introduction:

The developing embryo, which starts to develop from a flat sheet of cells, grows to acquire a typical cylindrical shape which takes place through the process of characteristic embryonic folding. The embryo begins to fold laterally and then folds at both the ends, forming a distinct C-shape with a distinct head and tail end.

Expert Solution & Answer

Answer to Problem 1RAC

The correct answer is option (b) weeks 3-8 of development.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) weeks 3-8 of development. The major organ system development takes place during the 5^th week of embryonic development. The neural tube starts forming, and the embryo is surrounded by amniotic fluid. The major organ system like the nervous system (brain and spinal cord) and heart are formed. So, the correct answer is option (b).

Explanation for incorrect answer:

Option (a) week 1 and 2 of development. The major organ system is not developed during 1^st and 2^nd week, as the zygote gets implanted during the first two weeks and forms embryonic and placental structures. So, this is an incorrect option.

Option (c) weeks 8-20 of development. During 8-20 weeks of development most of the organ systems have been formed, and the nerve centers start forming senses through rapid brain growth. The layers of skin also start to form. So, this is an incorrect answer.

Option (d) the last 30 weeks of development. During last 30 weeks of development the brain of the fetus is still growing, and the red blood cells start to form in the bone marrow, and the bones also start to harden. So, this is an incorrect answer.

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Answer 5

Chapter 29, Problem 1RAC

Summary Introduction

Introduction:

The developing embryo, which starts to develop from a flat sheet of cells, grows to acquire a typical cylindrical shape which takes place through the process of characteristic embryonic folding. The embryo begins to fold laterally and then folds at both the ends, forming a distinct C-shape with a distinct head and tail end.

Expert Solution & Answer

Answer to Problem 1RAC

The correct answer is option (b) weeks 3-8 of development.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) weeks 3-8 of development. The major organ system development takes place during the 5^th week of embryonic development. The neural tube starts forming, and the embryo is surrounded by amniotic fluid. The major organ system like the nervous system (brain and spinal cord) and heart are formed. So, the correct answer is option (b).

Explanation for incorrect answer:

Option (a) week 1 and 2 of development. The major organ system is not developed during 1^st and 2^nd week, as the zygote gets implanted during the first two weeks and forms embryonic and placental structures. So, this is an incorrect option.

Option (c) weeks 8-20 of development. During 8-20 weeks of development most of the organ systems have been formed, and the nerve centers start forming senses through rapid brain growth. The layers of skin also start to form. So, this is an incorrect answer.

Option (d) the last 30 weeks of development. During last 30 weeks of development the brain of the fetus is still growing, and the red blood cells start to form in the bone marrow, and the bones also start to harden. So, this is an incorrect answer.

Answer 6

Chapter 29, Problem 1RAC

Summary Introduction

Introduction:

The developing embryo, which starts to develop from a flat sheet of cells, grows to acquire a typical cylindrical shape which takes place through the process of characteristic embryonic folding. The embryo begins to fold laterally and then folds at both the ends, forming a distinct C-shape with a distinct head and tail end.

Expert Solution & Answer

Answer to Problem 1RAC

The correct answer is option (b) weeks 3-8 of development.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) weeks 3-8 of development. The major organ system development takes place during the 5^th week of embryonic development. The neural tube starts forming, and the embryo is surrounded by amniotic fluid. The major organ system like the nervous system (brain and spinal cord) and heart are formed. So, the correct answer is option (b).

Explanation for incorrect answer:

Option (a) week 1 and 2 of development. The major organ system is not developed during 1^st and 2^nd week, as the zygote gets implanted during the first two weeks and forms embryonic and placental structures. So, this is an incorrect option.

Option (c) weeks 8-20 of development. During 8-20 weeks of development most of the organ systems have been formed, and the nerve centers start forming senses through rapid brain growth. The layers of skin also start to form. So, this is an incorrect answer.

Option (d) the last 30 weeks of development. During last 30 weeks of development the brain of the fetus is still growing, and the red blood cells start to form in the bone marrow, and the bones also start to harden. So, this is an incorrect answer.

Answer 7

Chapter 29, Problem 1RAC

Summary Introduction

Introduction:

The developing embryo, which starts to develop from a flat sheet of cells, grows to acquire a typical cylindrical shape which takes place through the process of characteristic embryonic folding. The embryo begins to fold laterally and then folds at both the ends, forming a distinct C-shape with a distinct head and tail end.

Answer 8

Expert Solution & Answer

Answer to Problem 1RAC

The correct answer is option (b) weeks 3-8 of development.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) weeks 3-8 of development. The major organ system development takes place during the 5^th week of embryonic development. The neural tube starts forming, and the embryo is surrounded by amniotic fluid. The major organ system like the nervous system (brain and spinal cord) and heart are formed. So, the correct answer is option (b).

Explanation for incorrect answer:

Option (a) week 1 and 2 of development. The major organ system is not developed during 1^st and 2^nd week, as the zygote gets implanted during the first two weeks and forms embryonic and placental structures. So, this is an incorrect option.

Option (c) weeks 8-20 of development. During 8-20 weeks of development most of the organ systems have been formed, and the nerve centers start forming senses through rapid brain growth. The layers of skin also start to form. So, this is an incorrect answer.

Option (d) the last 30 weeks of development. During last 30 weeks of development the brain of the fetus is still growing, and the red blood cells start to form in the bone marrow, and the bones also start to harden. So, this is an incorrect answer.

Answer 12

Ch. 29.1 - Describe the three parts of the prenatal period,...Ch. 29.1 - Distinguish between clinical age and postovulatory...Ch. 29.1 - Prob. 3AYP Ch. 29.1 - Prob. 4AYP Ch. 29.1 - Prob. 5AYP Ch. 29.1 - What events occur during the first week after...Ch. 29.1 - Prob. 7AYP Ch. 29.1 - Explain the process of implantation and the...Ch. 29.1 - Prob. 9AYP Ch. 29.1 - Prob. 10AYP

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