Unit 5 Review

Match the vocabulary word to the definition

• DNA

• carries the genetic code in the form of genes

• Chromosome

• section of a chromosome that has the code for a trait

• Gene

• tightly wound strand of DNA

• Allele

• version of a gene

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A student used a computer simulation to build a model of a DNA molecule. Which of the following is the best suggestion to improve the model? (LS.10a)

• Change the order of the nitrogenous bases.

• Twist the model.

• Fold the model in half.

• Switch the position of the sugars and the nitrogenous bases.

Tags

NGSS.HS-LS1-1

Which of the following is true about DNA? Select two correct statements.

• DNA determines which language people speak.

• DNA codes genetic information for an entire organism.

• DNA transfers genetic information between generations.

• DNA transfers energy between cells.

Tags

NGSS.HS-LS1-1

In 1994, a scientist discovered the BRCA-1 gene. People with this gene have a much higher chance of developing breast cancer. This discovery now allows doctors to screen and treat people before cancer develops.

What does the discovery of the BRCA-1 gene demonstrate about the importance of researching genetics?

• Understanding genetics helps us learn about our ancestors’ cultures.

• DNA research can be used to solve crimes.

• Genetic discoveries can help improve human health.

• Genetic discoveries are often harmful to people.

Tags

NGSS.HS-LS1-1

What is the probability of the phenotypes of the offspring?

• Black: 75%, White: 25%

• Black: 50%, White: 50%

• Black: 25%, White: 75%

• Black: 100%, White: 0%

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

If only one parent was heterozygous (Ff) and the other one was homozygous dominant (FF), what are the probabilities for the genotype Ff of their offspring?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

One breed of chickens can have either brown or white feathers. A brown chicken was crossed with a white chicken. Both parents were homozygous. All the offspring had brown feathers. What best describes the alleles for this trait?

• Both parents have the same alleles for feather color.

• The brown feather allele is recessive to the white feather allele.

• The white feather allele is recessive to the brown feather allele.

• The offspring have inherited the brown feather allele from both parents.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A characteristic that is developed during an individual’s lifetime.

• Inherited

• Acquired

• Neither

• Both

A characteristics that can be passed from parents to offspring.

• Inherited

• Acquired

• Neither

• Both

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In humans, dimples (D) and freckles (F) are both dominant traits that can be inherited.

What is the genotype for a person with freckles?

• FF

• Ff

• ff

• Dd

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2