During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Question

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Answer 1

Question

Chapter 29, Problem 1TYR

Summary Introduction

Introduction:

During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Expert Solution & Answer

Answer to Problem 1TYR

Correct answer:

The conceptus reaches the uterus about 72 hours after ovulation. It consists of more than 16 cells and resembles a mulberry. Hence, it is called a morula. Therefore, option b is correct.

Explanation of Solution

Justify reasons for the correct statement:

The morula is smaller than the zygote. Small blastomeres are produced by cleavage. Cleavage also initiates the production of large amounts of cells, by which the embryonic tissues are formed. Meanwhile, the morula produces identical twins and divides into two cell masses.

Option (b) is given as, “morula”.

In the uterine cavity, the morula lies freely for 4 to 5 days and starts multiplying into more than 100 cells.

Hence, option (b) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as, “zygote”.

Zygote multiplies into hundreds of cells. These cells are established into three primary germ layers, and the conceptus is attached to the uterine wall firmly. Hence, it is a wrong answer.

Option (c) is given as, “blastomere”.

After fertilization, the first cleavage produces two daughter cells or blastomeres. These cells proliferate at shorter time intervals. Hence, the number of blastomeres is increased. Hence, it is a wrong answer.

Option (d) is given as, “blastocyst”.

During embryonic development, a hollow thin structure consists of a group of cells (inner cell masses) called blastocyst. The embryo arises from the blastocyst. Hence, it is a wrong answer.

Option (e) is given as, “embryo”.

Fertilized egg is called as an embryo. Hence, it is a wrong answer.

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

Conclusion

Morula is a spheroidal stage, and it consists of more than 16 blastomeres.

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Answer 2

Question

Chapter 29, Problem 1TYR

Summary Introduction

Introduction:

During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Expert Solution & Answer

Answer to Problem 1TYR

Correct answer:

The conceptus reaches the uterus about 72 hours after ovulation. It consists of more than 16 cells and resembles a mulberry. Hence, it is called a morula. Therefore, option b is correct.

Explanation of Solution

Justify reasons for the correct statement:

The morula is smaller than the zygote. Small blastomeres are produced by cleavage. Cleavage also initiates the production of large amounts of cells, by which the embryonic tissues are formed. Meanwhile, the morula produces identical twins and divides into two cell masses.

Option (b) is given as, “morula”.

In the uterine cavity, the morula lies freely for 4 to 5 days and starts multiplying into more than 100 cells.

Hence, option (b) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as, “zygote”.

Zygote multiplies into hundreds of cells. These cells are established into three primary germ layers, and the conceptus is attached to the uterine wall firmly. Hence, it is a wrong answer.

Option (c) is given as, “blastomere”.

After fertilization, the first cleavage produces two daughter cells or blastomeres. These cells proliferate at shorter time intervals. Hence, the number of blastomeres is increased. Hence, it is a wrong answer.

Option (d) is given as, “blastocyst”.

During embryonic development, a hollow thin structure consists of a group of cells (inner cell masses) called blastocyst. The embryo arises from the blastocyst. Hence, it is a wrong answer.

Option (e) is given as, “embryo”.

Fertilized egg is called as an embryo. Hence, it is a wrong answer.

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

Conclusion

Morula is a spheroidal stage, and it consists of more than 16 blastomeres.

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Answer 3

Question

Chapter 29, Problem 1TYR

Summary Introduction

Introduction:

During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Expert Solution & Answer

Answer to Problem 1TYR

Correct answer:

The conceptus reaches the uterus about 72 hours after ovulation. It consists of more than 16 cells and resembles a mulberry. Hence, it is called a morula. Therefore, option b is correct.

Explanation of Solution

Justify reasons for the correct statement:

The morula is smaller than the zygote. Small blastomeres are produced by cleavage. Cleavage also initiates the production of large amounts of cells, by which the embryonic tissues are formed. Meanwhile, the morula produces identical twins and divides into two cell masses.

Option (b) is given as, “morula”.

In the uterine cavity, the morula lies freely for 4 to 5 days and starts multiplying into more than 100 cells.

Hence, option (b) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as, “zygote”.

Zygote multiplies into hundreds of cells. These cells are established into three primary germ layers, and the conceptus is attached to the uterine wall firmly. Hence, it is a wrong answer.

Option (c) is given as, “blastomere”.

After fertilization, the first cleavage produces two daughter cells or blastomeres. These cells proliferate at shorter time intervals. Hence, the number of blastomeres is increased. Hence, it is a wrong answer.

Option (d) is given as, “blastocyst”.

During embryonic development, a hollow thin structure consists of a group of cells (inner cell masses) called blastocyst. The embryo arises from the blastocyst. Hence, it is a wrong answer.

Option (e) is given as, “embryo”.

Fertilized egg is called as an embryo. Hence, it is a wrong answer.

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

Conclusion

Morula is a spheroidal stage, and it consists of more than 16 blastomeres.

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Answer 4

Question

Chapter 29, Problem 1TYR

Summary Introduction

Introduction:

During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Expert Solution & Answer

Answer to Problem 1TYR

Correct answer:

The conceptus reaches the uterus about 72 hours after ovulation. It consists of more than 16 cells and resembles a mulberry. Hence, it is called a morula. Therefore, option b is correct.

Explanation of Solution

Justify reasons for the correct statement:

The morula is smaller than the zygote. Small blastomeres are produced by cleavage. Cleavage also initiates the production of large amounts of cells, by which the embryonic tissues are formed. Meanwhile, the morula produces identical twins and divides into two cell masses.

Option (b) is given as, “morula”.

In the uterine cavity, the morula lies freely for 4 to 5 days and starts multiplying into more than 100 cells.

Hence, option (b) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as, “zygote”.

Zygote multiplies into hundreds of cells. These cells are established into three primary germ layers, and the conceptus is attached to the uterine wall firmly. Hence, it is a wrong answer.

Option (c) is given as, “blastomere”.

After fertilization, the first cleavage produces two daughter cells or blastomeres. These cells proliferate at shorter time intervals. Hence, the number of blastomeres is increased. Hence, it is a wrong answer.

Option (d) is given as, “blastocyst”.

During embryonic development, a hollow thin structure consists of a group of cells (inner cell masses) called blastocyst. The embryo arises from the blastocyst. Hence, it is a wrong answer.

Option (e) is given as, “embryo”.

Fertilized egg is called as an embryo. Hence, it is a wrong answer.

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

Conclusion

Morula is a spheroidal stage, and it consists of more than 16 blastomeres.

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Answer 5

Chapter 29, Problem 1TYR

Summary Introduction

Introduction:

During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Expert Solution & Answer

Answer to Problem 1TYR

Correct answer:

The conceptus reaches the uterus about 72 hours after ovulation. It consists of more than 16 cells and resembles a mulberry. Hence, it is called a morula. Therefore, option b is correct.

Explanation of Solution

Justify reasons for the correct statement:

The morula is smaller than the zygote. Small blastomeres are produced by cleavage. Cleavage also initiates the production of large amounts of cells, by which the embryonic tissues are formed. Meanwhile, the morula produces identical twins and divides into two cell masses.

Option (b) is given as, “morula”.

In the uterine cavity, the morula lies freely for 4 to 5 days and starts multiplying into more than 100 cells.

Hence, option (b) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as, “zygote”.

Zygote multiplies into hundreds of cells. These cells are established into three primary germ layers, and the conceptus is attached to the uterine wall firmly. Hence, it is a wrong answer.

Option (c) is given as, “blastomere”.

After fertilization, the first cleavage produces two daughter cells or blastomeres. These cells proliferate at shorter time intervals. Hence, the number of blastomeres is increased. Hence, it is a wrong answer.

Option (d) is given as, “blastocyst”.

During embryonic development, a hollow thin structure consists of a group of cells (inner cell masses) called blastocyst. The embryo arises from the blastocyst. Hence, it is a wrong answer.

Option (e) is given as, “embryo”.

Fertilized egg is called as an embryo. Hence, it is a wrong answer.

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

Conclusion

Morula is a spheroidal stage, and it consists of more than 16 blastomeres.

Answer 6

Chapter 29, Problem 1TYR

Summary Introduction

Introduction:

During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Expert Solution & Answer

Answer to Problem 1TYR

Correct answer:

The conceptus reaches the uterus about 72 hours after ovulation. It consists of more than 16 cells and resembles a mulberry. Hence, it is called a morula. Therefore, option b is correct.

Explanation of Solution

Justify reasons for the correct statement:

The morula is smaller than the zygote. Small blastomeres are produced by cleavage. Cleavage also initiates the production of large amounts of cells, by which the embryonic tissues are formed. Meanwhile, the morula produces identical twins and divides into two cell masses.

Option (b) is given as, “morula”.

In the uterine cavity, the morula lies freely for 4 to 5 days and starts multiplying into more than 100 cells.

Hence, option (b) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as, “zygote”.

Zygote multiplies into hundreds of cells. These cells are established into three primary germ layers, and the conceptus is attached to the uterine wall firmly. Hence, it is a wrong answer.

Option (c) is given as, “blastomere”.

After fertilization, the first cleavage produces two daughter cells or blastomeres. These cells proliferate at shorter time intervals. Hence, the number of blastomeres is increased. Hence, it is a wrong answer.

Option (d) is given as, “blastocyst”.

During embryonic development, a hollow thin structure consists of a group of cells (inner cell masses) called blastocyst. The embryo arises from the blastocyst. Hence, it is a wrong answer.

Option (e) is given as, “embryo”.

Fertilized egg is called as an embryo. Hence, it is a wrong answer.

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

Conclusion

Morula is a spheroidal stage, and it consists of more than 16 blastomeres.

Answer 7

Chapter 29, Problem 1TYR

Summary Introduction

Introduction:

During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Answer 8

Expert Solution & Answer

Answer to Problem 1TYR

Correct answer:

The conceptus reaches the uterus about 72 hours after ovulation. It consists of more than 16 cells and resembles a mulberry. Hence, it is called a morula. Therefore, option b is correct.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Justify reasons for the correct statement:

The morula is smaller than the zygote. Small blastomeres are produced by cleavage. Cleavage also initiates the production of large amounts of cells, by which the embryonic tissues are formed. Meanwhile, the morula produces identical twins and divides into two cell masses.

Option (b) is given as, “morula”.

In the uterine cavity, the morula lies freely for 4 to 5 days and starts multiplying into more than 100 cells.

Hence, option (b) is correct.

Justify reasons for the incorrect statements:

Option (a) is given as, “zygote”.

Zygote multiplies into hundreds of cells. These cells are established into three primary germ layers, and the conceptus is attached to the uterine wall firmly. Hence, it is a wrong answer.

Option (c) is given as, “blastomere”.

After fertilization, the first cleavage produces two daughter cells or blastomeres. These cells proliferate at shorter time intervals. Hence, the number of blastomeres is increased. Hence, it is a wrong answer.

Option (d) is given as, “blastocyst”.

During embryonic development, a hollow thin structure consists of a group of cells (inner cell masses) called blastocyst. The embryo arises from the blastocyst. Hence, it is a wrong answer.

Option (e) is given as, “embryo”.

Fertilized egg is called as an embryo. Hence, it is a wrong answer.

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

Answer 12

Conclusion

Morula is a spheroidal stage, and it consists of more than 16 blastomeres.

Answer 13

Ch. 29.1 - Prob. 1BYGO Ch. 29.1 - Prob. 2BYGO Ch. 29.1 - Prob. 3BYGO Ch. 29.1 - Prob. 4BYGO Ch. 29.1 - Why sperm must meet an egg near the distal end of...Ch. 29.1 - Prob. 2AYLO Ch. 29.1 - Prob. 3AYLO Ch. 29.1 - Prob. 4AYLO Ch. 29.1 - Events that occur between penetration by a sperm...Ch. 29.1 - The division of pregnancy into three trimesters...

During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Solution Summary: The author explains that the conceptus reaches the uterus about 72 hours after ovulation and is called a morula.

Videos

Introduction:

During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Answer to Problem 1TYR

Explanation of Solution

Want to see more full solutions like this?

Chapter 29 Solutions

During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Solution Summary: The author explains that the conceptus reaches the uterus about 72 hours after ovulation and is called a morula.

Videos

Introduction: During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.

Answer to Problem 1TYR

Explanation of Solution

Want to see more full solutions like this?

Chapter 29 Solutions

Introduction:

During pre-embryonic stage, the zygote starts multiplying into more than hundreds of cells. These cells establish into primary germ layers, and the conceptus attaches to the uterine wall. This process is divided into cleavage, implantation, and embryogenesis.