Question

what is the primary focus of gene editing techniques such as crispr-cas9?
a. modifying existing genes precisely
b. inserting specific genes into dna
c. replicating entire organisms
d. cutting dna at targeted locations

which example best illustrates the application of cloning?
a. correcting genetic mutations causing diseases
b. replicating an endangered species to preserve its genetic diversity
c. twin studies
d. producing insulin using genetically modified bacteria

what is a key ethical dilemma in the field of human gene editing?
a. the possibility of enhancing traits beyond medical needs, such as intelligence or physical appearance
b. its potential to create more resilient crops
c. its use in producing biodegradable plastics
d. its ability to increase crop yields

Explanation:

First Question:

CRISPR - Cas9 is a gene - editing tool. Its main function is to cut DNA at specific, targeted locations. Option a is about precise gene modification, but the primary action of CRISPR - Cas9 is cutting. Option b is about inserting genes, which is a subsequent step after cutting. Option c is about cloning, which is different from gene editing. So the correct answer is d.

Cloning involves creating a genetically identical copy of an organism. Option a is about gene therapy (correcting mutations), not cloning. Option c, twin studies, are about studying the genetics of twins, not cloning. Option d is about genetic engineering (producing insulin via modified bacteria), not cloning. Replicating an endangered species to preserve its genetic diversity is an application of cloning. So the correct answer is b.

Ethical dilemmas in human gene editing relate to issues like enhancing non - medical traits (e.g., intelligence, appearance). Options b, c, and d are about applications in agriculture or industrial production, not human gene editing ethical issues. So the correct answer is a.

Answer:

d. Cutting DNA at targeted locations

Second Question: