Unit Test Answers

Pedigrees are used to help geneticists understand how traits are inherited between generations. The Romanovs, a Russian royal family, had a history of hemophilia, a sex-linked disorder that is determined by a recessive allele on the X chromosome.What is the best evidence to prove that Irene was heterozygous for hemophilia?

The use of DDT as a pesticide is an example of how new technology can have favorable and dangerous long-term outcomes. How does this relate to the use of DNA technology?

Which most directly describes a benefit of using DNA technology in medicine?

A young boy has been found, and police are trying to locate his family. They take a DNA sample from him and begin collecting DNA samples from families who have missing children. If police use DNA samples only from the fathers, which type of DNA technology can they use to identify the boy's parent?

The process of genetic engineering may include either four or five steps. The diagram represents the five-step process.Which best describes step 2?

Why are scientists concerned about the use of the Bt toxin, which is used to kill insects, in genetic engineering?

Which allele combination represents a male who has an X-linked recessive disorder?

Scientists have recently modified the bacteria that cause tooth decay by inserting a fragment of DNA into the bacteria's DNA that prevents it from producing lactic acid. What is this process called?

Why might scientists be interested in making transgenic organisms?

Which statement best explains why the process of genetic engineering is important to the scientific community?

The results of Thomas Hunt Morgan’s last cross are shown in the Punnett square below. Which of Thomas Hunt Morgan's hypotheses was valid based on these results?

Hemophilia is an X-linked recessive disorder that is passed through generations and can be traced by using a pedigree. In the pedigree that is shown, which represents Irene's allele combination?

Parkinson’s disease is a brain disorder that may be caused by mutations in several genes that code for the production of alpha-synuclein. Individuals who have Parkinson’s disease exhibit symptoms such as uncontrollable tremors, difficulty walking, and loss of coordination. How might geneticists determine where the mutations that cause Parkinson’s disease are located?

Which is a potential negative consequence of using genetically engineered medicine?