An organism composed of two or more genetically distinct tissues, as an organism that is partly male and partly female, or an artificially produced individual having tissues of several species.
How Chimeras Are formed:
Chimeras are formed when two fertilized eggs or early embryos fuse together. Each different population of cells keeps its own characteristics, resulting in an animal with mixed and matched parts.
Research:
A "geep" (pictured) was produced in 1984 by combining sheep and goat cells
There have been rat/mouse chimeras, and human/rabbit embryos
Embryos that are created are usually not allowed to develop into fully grown animals
In August 2003, researchers in China fused human skin cells and rabbit eggs to produce stem cells.
In 2007, researchers in the US created a sheep with 15% human and 85% animal cells
Uses:
Human skin cells can be combined with animal cells to produce stem cells
Animals with human organs can be given to humans if they need them
Allows us to learn about embryos and development
Can be used to study the effects diseases and treatments on humans
Legal Issues of Chimeras
Human Fertilization and Embryoloy Act (HEFA)
Created 1990
Formed in the UK
First legislation relating to chimeras, and other areas relating to bioethics
Allows only those with a bioethics license to perform embryonic testing
On May 18 Britain Legalized the creation of human-animal embryos
Other Countries Legal Issues With Chimeras
Many countries have banned the swapping of embryos
Other Countries such as Australia have recently legalized embryonic testing
American Laws on Chimeras
Few laws prohibiting chimeras
Only a few states have laws
Most beliefs are dependent on religion
Ethics:
To understand whether you think creating chimeras for human gain is morally right or wrong you must understand the pros and cons of the issue
Pros-
Chimeras can be used to create organs for people who need a transplant
Some chimera’s have been used to understand the affects of diseases and medicines on humans
Chimera research is aiding in the understanding of human development
Does not require embryonic stem cells
Almost all of the uses of chimeras fall within the ethical guidelines that have been established
Cons-
Chimera research goes against some religious beliefs
Some chimeras do not receive proper treatment
Researchers don’t generally allow the chimeras to fully develop
Study Questions-
There are many ethical issues surrounding the production and treatment of genetically produced chimeras, most of which even the scientists leading chimera research have not been able to fully answer. Some of these questions are:
How human should we make chimeras?
What rights do the animal-human chimeras have?
Should we be allowed to reconstruct genetic codes for our own benefit?
What harm can we be doing to the animals we are modifying?
Date of Review: 5/20/08 Review of Site: (must cover all aspects of evaluation questionnaire) The website was an article shown in Time magazine. The information is updated. The article is from 1984. The article holds no political or religious views, and it is more of a brief overview of how a geep, a type of chimera is formed. The purpose of the article is to inform the people chimeras and about how they are formed. I believe this website has many good articles on different topics, and I found the information easy to obtain and easy to understand. Website URL:http://www.bionity.com/lexikon/e/Chimera_(genetics)<span
Name of Reviewer: David Keim
Date of Review: 5/20/08
Review of Site: (must cover all aspects of evaluation questionnaire)
This website is run by the Chemie.DE Information Service. There is no date on the website. There are no biases, and the information is not an opinion. It is a brief overview, touching on the various types of chimeras. The website is intended to promote the Chemie.DE Information Service, and to sell laboratory equipment. Overall, I would recommend this website for those who want a brief overview of chimeras.
Review of Site: This article appeared on msnbc.com. It was last updated at 5:43 pm on April 29th 2005. The author maintains an unbiased viewpoint, simply trying to inform the reader. The article is a brief overview of how scientists are mixing human cells with animals to both study human development and provide vital organs to people in need.
Definition:
An organism composed of two or more genetically distinct tissues, as an organism that is partly male and partly female, or an artificially produced individual having tissues of several species.How Chimeras Are formed:
Chimeras are formed when two fertilized eggs or early embryos fuse together. Each different population of cells keeps its own characteristics, resulting in an animal with mixed and matched parts.Research:
Uses:
Legal Issues of Chimeras
Human Fertilization and Embryoloy Act (HEFA)
Other Countries Legal Issues With Chimeras
American Laws on Chimeras
Ethics:
To understand whether you think creating chimeras for human gain is morally right or wrong you must understand the pros and cons of the issuePros-
Cons-
Study Questions-
There are many ethical issues surrounding the production and treatment of genetically produced chimeras, most of which even the scientists leading chimera research have not been able to fully answer. Some of these questions are:Website Reviews:
Website URL: http://www.time.com/time/magazine/article/</span>
0,9171,921546,00.html
Name of Reviewer: Kevin Stetson
Date of Review: 5/20/08
Review of Site: (must cover all aspects of evaluation questionnaire)
The website was an article shown in Time magazine. The information is updated. The article is from 1984. The article holds no political or religious views, and it is more of a brief overview of how a geep, a type of chimera is formed. The purpose of the article is to inform the people chimeras and about how they are formed. I believe this website has many good articles on different topics, and I found the information easy to obtain and easy to understand.
Website URL: http://www.bionity.com/lexikon/e/Chimera_(genetics)<span
Name of Reviewer: David Keim
Date of Review: 5/20/08
Review of Site: (must cover all aspects of evaluation questionnaire)
This website is run by the Chemie.DE Information Service. There is no date on the website. There are no biases, and the information is not an opinion. It is a brief overview, touching on the various types of chimeras. The website is intended to promote the Chemie.DE Information Service, and to sell laboratory equipment. Overall, I would recommend this website for those who want a brief overview of chimeras.
Website URL: http://www.msnbc.msn.com/id/7681252/</span>
Name of Reviewer: Sean
Date of Review: 5/19/08
Review of Site: This article appeared on msnbc.com. It was last updated at 5:43 pm on April 29th 2005. The author maintains an unbiased viewpoint, simply trying to inform the reader. The article is a brief overview of how scientists are mixing human cells with animals to both study human development and provide vital organs to people in need.
Bibliography:
http://en.wikipedia.org/wiki/Chimera_%28genetics%29http://www.time.com/time/magazine/article/</span>
0,9171,921546,00.html
http://www.bionity.com/lexikon/e/Chimera_(genetics)<span
http://www.msnbc.msn.com/id/7681252/</span
[[http://nochimera.tech.officelive.com/default.aspx%3C/span%3E%3C/span|http://nochimera.tech.officelive.com/default.aspx</span]]>