Biology: Science for Life with Physiology (5th Edition)
5th Edition
ISBN: 9780321922212
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 9, Problem 1CTS
Summary Introduction
To analyze:
Human cloning could be as common as the in vitro fertilization now, or in future.
Introduction:
The in-vitro fertilization is a technique, in which the fertilization occurs outside the fallopian tube and outside the body of mother. The cloning is the technique of creating genetic identical individuals or humans.
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Cloning is the process of creating genetically identical organisms. One simple method of cloning is called artificial embryo twinning. In this process, an early stage embryo is separated into two groups of cells. Each group of cells is then allowed to develop. The embryos are then implanted into the surrogate mother. Each embryo is genetically identical to the other. Some pregnancies in humans have a similar result.
Explain how identical twins are formed.
Compare and contrast the natural formation of identical twins to the artificial embryo twinning process.
Explain how the formation of identical twins or the process of artificial embryo twinning differs from the formation of fraternal twins.
A controversial issue, closely related to cloning, that has caused a lot of debate is the use of embryonic stem cells. One possible application of these cells is that they may be able to supply replacement tissues to treat diseases such as Parkinson's disease, diabetes, paralysis due to spinal cord injuries, and other degenerative diseases. The word "embryonic", has caused fierce opposition to this type of research because embryos are destroyed when the stem cells are removed. Questions that have surfaced in this debate include: When a cell nucleus is transferred to another cell, have we created life? Does a stem cell have the same status as a human? What should be done with the embryos that are leftover at in vitro fertilization (IVF), clinics? Advocates argue that the medical benefits of stem cell research would be enormous. Opponents argue that life begins at conception and thus this type of research is abortion.
Based on what you have read, explain why you are for or against stem…
How might the study of therapeutic cloning benefit scientific studies of reproductive cloning?
Chapter 9 Solutions
Biology: Science for Life with Physiology (5th Edition)
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- Dolly is the first mammal to have been successfully cloned from an adult cell Which of the following statement/s is/are most relevant to the birth of Dolly? I. It suggests that human could be cloned. II. It proves that specialized cells could be used to create an exact copy of the animal they came from. III. It improves the production of milk, meat, and other products from livestock. IV. It proves that animals could be cloned to have gene mutations that help scientists study diseases that develop in the animals. A. II only B. I and II C. III, and IV D. II, III, and IV Which of the following statements best explain the significance of mitosis and ? A. Both mitosis and meiosis produce diploid cells which responsible for the continuity of life. B. Many single-celled organisms rely on mitosis and meiosis as their primary means of asexual reproduction C. replication, cells have another interesting choice, whether they want to make an identical copy, or do they want to make four half-copies…arrow_forwardThe following diagram outlines how the process of cloning a sheep was accomplished. Cloning is the process of creating a genetically identical copy of another individual. With Dolly, the first cloned mammal, an egg cell was removed from a donor (B) and the nucleus was removed from the egg cell. Then cells from a sheep's mammary gland were removed from a second donor (A). The nucleus of one of the cells from the mammary gland was fused with the enucleated egg cell using an electrical pulse. The fused cell underwent cell division and at the blastocyst stage was implanted into a surrogate mother sheep. The fused cell is cultured and is implanted as a multi-celled embryo. During the step where the fused cell begins dividing normally, the cells of the future clone undergo Select one: a. fertilization b. meiosis c. mitosis d. gene splicingarrow_forwardIn the protocol, why is the nucleus of the oocyte removed?arrow_forward
- Cloning is a general term used for whole organisms and DNA sequences. Define what we mean when we say we have a clone.arrow_forwardFor each of the following scenarios, indicate YES (it is cloning) or NO (it is not cloning). 6. ___________ Sperm taken from a male goat is combined with a female's egg in a petri dish. The resulting embryo is implanted into the female's uterus to develop 7. ___________ A sheep embryo, composed of 16 cells, is removed from the mother's uterus and separated into individual cells. Each cell is allowed to multiply, creating 16 separate embryos, which are then implanted in different female sheep to develop to maturity. 8. ___________ A cow with many desirable traits is stimulated with hormones to produce a number of egg cells. Each of these eggs is fertilized and implanted into a surrogate mother. 9. ___________ Cell nuclei from a recently deceased dog are placed into enucleated egg cells from another female dog. These egg cells are then placed into the uterus of an additional female surrogate dog, where it grows into a puppy.arrow_forwardThere are many applications of cloning technology. List the applications that you think are most acceptable and those that are least acceptable. Explain your reasoning.arrow_forward
- In the reproductive cloning of an animal, the genome of the cloned individual comes from ________ a. a sperm cell b. an egg cell c. any gamete cell d. a body cellarrow_forwardResearch has now demonstrated that techniques that have been developed for cloning animals could be used to clone human embryos, although no living human clones have been produced. There is widespread consensus that cloning a live human would be unethical. However, some people have suggested creating cloned embryos from which stem or pluripotent cells, which have the ability to develop into any tissue or organ, could be extracted. The stem and pluripotent cells might then be used to create genetically identical tissues and organs that could then be transplanted back into the donor to treat failed organs and diseases. What might be some reasons for or against this type of therapeutic cloning?arrow_forwardDo all of them True/False 31) The process by which an electrical charge is used to introduce DNA into a cell to produce a transgenic organism is called electroporation.Answer: 32) Reproductive cloning is used to produce large amounts of mammalian proteins from transgenic agricultural animals such as cattle.Answer: 33) In gene addition, homologous recombination is used to remove the original gene and replace it with the cloned gene.Answer: 34) All stem cells have the potential to differentiateAnswer: 35) A bone marrow transplant involves the transfer of multipotent stem cellsAnswer: 36) The fact that in mammalian systems multiple genes may compensate for the loss of a gene is called gene redundancy.Answer:arrow_forward
- For each of the following scenarios, indicate Yes (it is cloning) or NO (it is NOT cloning) _____________________Sperm taken from a mole goat is combined with a female’s egg in a petri dish. The resulting embryo is implanted into the female’s uterus to develop. _____________________A sheep embryo, composed of 17 cells, is removed from the mother’s uterus and separated into individual cells. Each cell is allowed to multiply, creating 16 separate embryos, which are then implanted in different female sheep to develop to maturity. _____________________A cow with many desirable traits is stimulated with hormones to produce a number of egg cells. Each of these eggs is fertilized and implanted into a surrogate mother. _____________________In vitro fertilization _____________________Cell nuclei from an extinct wooly mammoth are placed into enucleated cow cells.arrow_forwardOrder the steps to cloning an animal with the first step being on the top. Remove the nucleus from the egg cell. Female gives birth to a genetic clone of donor cell. Implant egg cell back into a female womb. Remove an egg cell, from the ovary of a female. Insert the nucleus of an adult cell you would like to clone into the egg cell. II II II IIarrow_forwardDo you feel CRISPR or other technologies are appropriate for use in human embryo’s? Why or why not? In what situations might this be acceptable to you?arrow_forward
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