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What Are Clones? Nuclear transfer to clone cattle is done by which of the following techniques? a. An 8-cell embryo is divided into two 4-cell embryos and implanted into a surrogate mother. b. A 16-cell embryo is divided into 16 separate cells, and those cells are allowed to form new 16-cell embryos that are implanted directly into surrogate mothers. c. A 2-cell embryo is divided into two separate cells and implanted into a surrogate mother. d. A 16-cell embryo is divided into 16 separate cells and fused with enucleated eggs. The fused eggs are then implanted into surrogate mothers. e. None of these.

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Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052

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Section
BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052
Chapter 13, Problem 2QP
Textbook Problem
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What Are Clones?

Nuclear transfer to clone cattle is done by which of the following techniques?

  1. a. An 8-cell embryo is divided into two 4-cell embryos and implanted into a surrogate mother.
  2. b. A 16-cell embryo is divided into 16 separate cells, and those cells are allowed to form new 16-cell embryos that are implanted directly into surrogate mothers.
  3. c. A 2-cell embryo is divided into two separate cells and implanted into a surrogate mother.
  4. d. A 16-cell embryo is divided into 16 separate cells and fused with enucleated eggs. The fused eggs are then implanted into surrogate mothers.
  5. e. None of these.

Summary Introduction

Introduction: A clone can be described as an individual who shares common genetic sequence. The process of the formation of identical twins which possess similar genetic material is known as “cloning.” The individuals formed from this process are considered as “clones.”

Explanation of Solution

Reason for correct answer:

In the mammals, the genetic material is contained inside the nucleus of the cell. The process of transferring nuclear material from a cell to another result in the production of genetically identical organisms. The main criterion in the formation of genetically identical organism is the transfer of genetic material from a cell and insertion of the same genetic material in a separate enucleated cell.

Option d. is given as “a 16-celled embryo which is divided into 16 separate cells and fused with enucleated eggs. The fused eggs then implanted into the surrogate mothers.”

Nuclear transfer to clone cattle takes place by “a 16-celled embryo which is divided into 16 separate cells and fused with enucleated eggs. These fused eggs are implanted into the surrogate mothers.” Hence, the correct answer is option d.

Reason for incorrect answer:

Option a. is given as, “An 8-cell embryo is divided into two 4-cell embryos and implanted into a surrogate mother.”

There is no information provided related to the transfer of genetic material into the enucleated cell...

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