Unit 6: Designer Babies

Shopping for DNA.

Editing human genes to prevent a child from inheriting a deadly disease sounds like a medical miracle. But what happens when parents want to use the same technology to make their child taller, smarter, or more athletic? In this unit, we discuss the ethical nightmare of genetic engineering and the terrifying history of trying to create the "perfect" human.

🧬 The Scientific Definitions

Bioethics (noun): The study of the ethical and moral implications of new biological discoveries and biomedical advances.
CRISPR (noun): A powerful piece of technology that allows scientists to easily alter DNA sequences and modify gene function.
IVF (noun): In Vitro Fertilization. A medical procedure where an egg is fertilized by sperm in a test tube or elsewhere outside the body.

1. Raw Vocabulary: The Science of Selection

Genome (noun): The complete set of genes or genetic material present in a cell or organism.

Eradicate (verb): To destroy completely; to put an end to something (like a virus or a genetic defect).

Eugenics (noun): The historically dark and dangerous practice of trying to improve the human species by selectively mating people with specific desirable hereditary traits.

Embryo (noun): An unborn human in the very early stages of development.

Trait (noun): A genetically determined characteristic (e.g., eye colour, height, susceptibility to a disease).

Predisposed (adj): To be genetically more likely to suffer from a particular disease or behave in a certain way.

Practice: Drag the correct scientific term into the bioethics debate!

genome

eradicate

eugenics

embryo

trait

predisposed

1. By editing the human , scientists believe they can cure hereditary illnesses before a child is even born.

2. Critics argue that selecting babies for their eye colour or intelligence is just a modern, high-tech version of .

3. If we can successfully conditions like cystic fibrosis from the gene pool, do we not have a moral obligation to do so?

4. During the IVF process, the doctor screened the to ensure it was healthy before implanting it.

5. He is genetically to heart disease because both his father and grandfather suffered from it.

6. Athletic ability isn't determined by a single gene; it is a highly complex physical .

2. Idioms and Expressions

When society discusses the consequences of meddling with science and nature, these heavy idioms are frequently used.

"To open Pandora's box." To start a process that will cause many unforeseen and uncontrollable problems.
"A slippery slope." An action or decision that seems harmless now, but will inevitably lead to a disastrous, unstoppable chain of events.
"To tamper with nature." To interfere with the natural order of things, often with negative or dangerous consequences.
"To level the playing field." To make a situation fair for everyone. (Conversely, designer babies might completely destroy the level playing field).
"To weed out." To systematically remove unwanted or undesirable elements from a group.

3. Reading: The Clinic Visit

Read this hypothetical scenario that might soon become a reality. Where do you draw the line?

David and Elena sit in the pristine office of a private fertility clinic. They are both carriers of the gene for Huntington’s disease, a devastating and fatal neurological condition. Through IVF and genetic screening, the doctor assures them they can weed out any embryos carrying the mutation. For this, they are incredibly grateful.

But then the doctor slides a sleek digital tablet across the desk. "While we are editing the genome," the doctor smiles, "we offer premium enhancement packages. For an additional $20,000, we can ensure your child is not predisposed to obesity. For $50,000, we can select the traits for above-average height and blue eyes. And for $100,000, we can apply cognitive boosters to increase their baseline IQ."

Elena is horrified, accusing the doctor of practicing eugenics and tampering with nature. David, however, hesitates. "If other parents are buying these upgrades for their kids," he argues, "our child will be left behind. It won't be a level playing field anymore. We have to give them the best start in life."

4. Grammar Focus: Future Continuous vs. Future Perfect

When debating the future of science, we need to distinguish between actions that will be in progress at a future time, and actions that will be completed by a future time.

Tense	Structure	Bioethics Example
Future Continuous	will be + verb-ing	"In twenty years, wealthy parents will be buying better DNA for their children." (An action in progress in the future).
Future Perfect	will have + Past Participle (V3)	"By 2050, scientists will have eradicated genetic blindness." (An action completed before a specific future time).

Exercise A: Choose the Correct Future Tense

1. I fear that by the end of the century, humanity ____________ a biological underclass of people who couldn't afford genetic upgrades.

2. "Don't worry," the doctor said, "At 10:00 AM tomorrow, we ____________ the healthy embryo into the uterus."

Exercise B: Complete the Expressions

Type the missing words to complete these heavy idioms.

1. If we allow parents to choose eye colour today, what will they choose tomorrow? It is a very slippery .

2. Editing human DNA to create super-soldiers or geniuses is essentially opening Pandora's .

5. The Hot Seat: Debate Practice 🎙️

In the reading, David argues that he must buy cognitive upgrades for his child to maintain a level playing field. Do you agree with his logic?
Is there a moral difference between editing a genome to eradicate a deadly disease, and editing it to prevent obesity or baldness? Where is the line?
If the technology becomes safe and available, do you believe that "designer babies" are inevitable, or will society reject tampering with nature?
Use the Future Perfect: What major genetic diseases do you think we will have cured by the year 2060?
Why do critics compare modern genetic selection to the dark history of eugenics? Is this a fair comparison?

Dominate the Discussion 🎙️

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