Biology USA 5 Review

While genetic engineering has positive benefits, there are also concerns associated with widespread use of genetic engineering in agriculture. If many farmers begin to plant more genetically modified crops that have an increased tolerance to insects, which of the following may result?

• A. an increase in the use of pesticides

• B. a decrease in genetic diversity of the crops

• C. an increase in the contamination of the water supply

• D. a decrease in crop productivity

Stem cell research has been a controversial subject in past years. What is the reason for this?

• A. Cells for study are often taken from human embryos.

• B. Stem cell techniques will not accomplish the intended purpose.

• C. The cells cannot be isolated.

• D. Replacement tissue will never be grown from a person's own stem cells.

What kind of genetically modified crops would be most successful in wet-tropical countries that are overcrowded?

• A. crops that are drought- and pest-resistant

• B. high-yield crops that do not need a lot of sunshine

• C. high-yield crops that are pest-resistant

• D. crops that are drought-resistant and need a lot of sunshine

In what way did gene therapy, the replacement of a faulty gene with a normal one, stimulate medical research?

• A. New medications had to be developed and tested.

• B. The effects of viral DNA had to be studied. .

• C. The way in which DNA replicates had to be determined.

• D. The genes on each chromosome had to be mapped and described

The way that crimes are solved today was affected by which of the following technologies?

• A. gene therapy

• B. DNA fingerprinting

• C. genetic testing

• D. Genetic modification

Which technology below would probably be the most important to a person who had diabetes and had to take insulin every day?

• A. testing parents for genetic disorders before they have children

• B. engineering fruits and vegetables that resist insects and other pests

• C. developing ways to identify criminals through DNA fingerprinting

• D. using recombinant DNA to produce human hormones from bacteria

Which of the following genotypes belongs in the red box in the Punnett square?

• X^BX^b
• X^bX^b
• X^bY
• X^BY

Which of the following genotypes belongs in the red box in the Punnett square?

• X^BX^b

• X^bX^b

• X^BX^B

• X^bY

Which of the following genotypes shows a CARRIER for a trait?

• X^BX^b

• X^bX^b

• X^BX^B

• X^bY

If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?

• sex-linked trait
• polygenic trait
• codominant trait
• incomplete dominance trait