Bioethics Genetic Engineering Stem Cell Research Flashcards
Genetic Engineering, Cloning, Stem Cell Research
asexual procreation
reproduction (as cell division, spore formation, fission, or budding) without union of individuals or gametes (Merriam-Webster)
type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes. Asexual reproduction is the primary form of reproduction for single-celled organisms, such as archaea and bacteria. Many plants and fungi sometimes reproduce asexually. (Wikipedia)
gamete
Gamete, sex, or reproductive, cell containing only one set of dissimilar chromosomes, or half the genetic material necessary to form a complete organism (i.e., haploid). Gametes are formed through meiosis (reduction division), in which a germ cell undergoes two fissions, resulting in the production of four gametes. During fertilization, male and female gametes fuse, producing a diploid (i.e., containing paired chromosomes) zygote. https://www.britannica.com/science/gamete
Dolly the sheep, 1997
Roslin Institute in Edinburgh, Scotland
First clone of adult mammal
Created asexually from single cell from her mother’s udder
Set off much debate about the morality of cloning generally, but specifically about human cloning
Created through two technologies: cloning and genetic engineering
http://dolly.roslin.ed.ac.uk/facts/the-life-of-dolly/index.html
Human Enbryo Model, Cambridge, 2023
https://www.catholicnewsagency.com/news/254608/first-reported-synthetic-human-embryo-sparks-ethical-concerns-creates-questions?mkt_tok=NDI3LUxFUS0wNjYAAAGMfFcwV0_SnkR7XN8fpgX565YBJDpvZ98mE7bEWRFWYnAsSSzrXBxb-vPY3Pqhy-WQVvPmdsxaEbacyaLt-mHlXGJnDWjb_g8NOnL0tZo
Watch this video about the Human Genome Project: https://youtu.be/8sh2ducI0ZA
an international scientific research project with the goal of determining the sequence of nucleotide base pairs that make up human DNA, and of identifying and mapping all of the genes of the human genome from both a physical and a functional standpoint. It remains the world’s largest collaborative biological project. After the idea was picked up in 1984 by the US government when the planning started, the project formally launched in 1990 and was declared complete on April 14, 2003. Funding came from the US government through the NIH and numerous other international groups.
genome
Genetic blueprint or code containing a complete set of chromosomes
chromosome
any of the rod-shaped or threadlike DNA-containing structures of cellular organisms that are located in the nucleus of eukaryotes, are usually ring-shaped in prokaryotes (such as bacteria), and contain all or most of the genes of the organism (Merriam-Webster)
a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
Francis Galton, 1822-1911
Coined term eugenics in 1883
(cousin of Darwin)
https://en.wikipedia.org/wiki/Francis_Galton
https://www.biography.com/people/francis-galton-9305647
http://www.galtoninstitute.org.uk/sir-francis-galton/
Plato
427-347 BC
In Republic, proposed the use of selective breeding to improve society.
eugenics
Pretty good summary here: https://en.wikipedia.org/wiki/Eugenics, in addition to history, a list of types of eugenics is included near bottom of article. Eugenics in the USA has its own article, which isn’t bad, but missing some information: https://en.wikipedia.org/wiki/Eugenics_in_the_United_States)
Text defines it as “the science of improving the genetic quality of offspring.”
From Greek eugenes, roughly translated “good stock or offspring.”
eu=good
genos=genes
eugenics
Note: “Improving genetic quality of offspring” is a controversial definition at this time.
Term coined in 1883, although ancient concept.
Result: marriage prohibition and sterilization of those deemed unfit to breed (those with low IQ, developmental, neurological differences, “deviants,” etc.).
These practices persist in the U.S. to this day, but mostly ceased in the 1970s and 80s.
Although formal eugenics “programs” do not exist in the U.S., they continue through selective abortion practices and genetic programs (euphemistically referred to as “transhumanism”).
sterilization
Medical procedure that renders a person unable to reproduce
Intended to be permanent, not reversible
Idiot, Imbecile, Moron
Idiots: those so defective that the mental development never exceeds that of a normal child of about two years.
Imbeciles: those whose development is higher than that of an idiot, but whose intelligence does not exceed that of a normal child of about seven years.
Morons: those whose mental development is above that of an imbecile, but does not exceed that of a normal child of about twelve years.
— Edmund Burke Huey, Backward and Feeble-Minded Children, 1912
Forcible sterilization
“Between 1907 and 1963, more than 64,000 people were forcibly sterilized in the U.S.”
The U.S. was one of the first countries to initiate forced sterilization (eugenics) programs, to prevent “unfit” people from reproducing.
Watch: https://youtu.be/FLM8dkIsHS0 (Part 1)
https://youtu.be/acVPt1qr5MY (Part 2)
https://www.ourbodiesourselves.org/book-excerpts/health-article/forced-sterilization/
https://en.wikipedia.org/wiki/Compulsory_sterilization
Watson & Crick
Francis Crick & James Watson stole the work of 33-year-old Rosalind Franklin and claimed it as their own.
1962 Nobel Prize for “discovery” of the molecular structure of DNA
Rosalind Franklin
Rosalind Franklin was the true scientist who discovered the structure of DNA, and did so at the young age of 33. Her paper was written first and all her work stolen (plagiarized) by Watson and Crick, who then received credit.
https://www.genengnews.com/commentary/rosalind-franklin-the-scientist/
Watch this video.
More on the Human Genome Project
HGP: worldwide cooperative effort to map the entire human genetic makeup or genome, began 1990
In 2003, the complete human genome sequence was released to the public.
Led to dramatic increase in number of genetic tests for various conditions (+1,600 currently)
The HGP has led to fears about what the information will be used for, like altering humans by replacing “undesirable” genes and restarting various eugenics practices and programs.
defining terms
genome: genetic blueprint or code containing a complete set of chromosomes
genotype: the genetic blueprint of a particular individual
Designing the Perfect Human?
Testing for specific genes may be possible shortly: obesity, nearsightedness, depression, alcoholism, Alzheimer’s, etc.
Ability to manipulate genotype
Is it moral to manipulate genetic makeup? Are there limits?
Creation of new genomes “from scratch,” new field of synthetic biology
Is DNA proprietary? (Can it be owned?)
Capitalism objectifies even human biology and turns people into commodities to be bought and sold.
Genetic engineering
An alteration of genetic material by artificial means
genetic engineering
gene therapy: introduction of normal or desirable genes into cells to override deleterious genes
genetic enhancement: manipulation of genetic material in order to improve a person’s phenotype
phenotype = the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment
germ cell
ovum and sperm
transgenic animals and plants
animals and plants with genes introduced from another species
trans = across
Safety of GM crops
“By the late 1980s, scientists were genetically altering food to improve durability and quality.”
FDA declared these foods safe.
Majority of foods grown in US are genetically modified.
Many other countries ban GM foods as unsafe.
GM foods are controversial.