AnswersFL-2000310-Biology 1 Sem 1 - FlexConsequences of DNA Technology

Consequences of DNA Technology — Cumulative exam Answers

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Pedigrees help geneticists understand how traits are inherited between generations. Red-green color blindness is a sex-linked disorder that is determined by a recessive allele on the X chromosome.If Brian has a son who is color-blind, what is known about the genotype of the son's mother?

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A
She must have at least one allele for color blindness.
B
She must have two alleles for color blindness.
C
She cannot be homozygous recessive for the gene for color blindness.
D
She cannot be a heterozygous carrier of the gene for color blindness.
22
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Hemophilia is an X-linked recessive disorder that is passed through generations and can be traced by using a pedigree. Who has hemophilia in the pedigree that is shown?

Question illustration
A
John and Ann
B
Fred and Luke
C
John, Charles, Jack, and Irene
D
Ann and Marie
23

One of the primary advantages of cell culture is the ability to isolate a single type of cell from a multicellular organism. How has this advance changed the study of biology?

A
Single-type cultures are easier and cheaper to maintain than cultures made of mixed cell types.
B
Scientists can completely avoid using animal or human test subjects during their experiments.
C
Cultures with single cell types behave in culture exactly as they would behave in a tissue or organ.
D
Scientists know that any response during an experiment is associated only with that cell type.
24

Which function of the cell cycle is especially important to burn victims?

A
growth of existing cells
B
repair of existing cells
C
protection of new cells
D
reproduction of new cells
25

How does a catalyst influence a chemical reaction?

A
It speeds up or slows down a chemical reaction by direct participation.
B
It reacts with products to increase the concentration of reactants.
C
It decreases the amount of energy necessary for the reaction to proceed.
D
It increases the total amount of products formed.

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