AnswersNC-Biology CR 2024Consequences of DNA Technology

Consequences of DNA Technology — Unit test Answers

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1
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Which is an application of DNA technology in medicine?

A
mapping human genes for manipulation
B
determining specific traits that a baby will have before its conception
C
producing disease resistant humans
D
determining hereditary diseases in individuals and families
2
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DDT was widely used as a pesticide for 20 years. Its use was banned after studies showed severe side effects were evident in humans, the environment, and animals as a result of DDT. Which reason best explains why the side effects of DDT were so harmful?

A
DDT kills insects and other pests.
B
DDT decomposes.
C
DDT was genetically engineered.
D
DDT bioaccumulates.
3

Which best describes biotechnology?

A
the process of analyzing DNA samples to identify individuals involved in criminal activities
B
DNA made by connecting fragments of DNA with desired traits from different DNA sources
C
the field of biology that uses genetic engineering to produce crops, pharmaceuticals, and enzymes for use in industry and manufacturing
D
the process of cutting DNA into fragments and inserting the fragments with a desired gene into another organism
4

Laura's mother is shown in the image. Which trait is Laura least likely to inherit from her mother?

Question illustration
A
brown eyes
B
pink hair
C
unclefted chin
D
no freckles
5

Mendel’s pea plants had either purple or white flowers. This means that the plants

A
can self-pollinate.
B
have two recessive traits.
C
have two alleles for the gene.
D
have two copies of a gene from one parent.
6

There are health concerns surrounding the products that have been genetically engineered for particular traits, including pharmaceuticals, crops, and enzymes that are used in industry and manufacturing processes. Which is a health concern that affects society?

A
patented products
B
bioaccumulation
C
land use
D
cancer
7

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?

Question illustration
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.
8

Which blood type could be given as a transfusion for patient with AB blood when the RH factor is unknown?

A
O+
B
A+
C
AB+
D
AB–
9

Joyce and Tim started piano lessons at the same time. They both practice about 30 minutes a day and enjoy playing the piano. Despite these similarities, Joyce has mastered many more piano skills than Tim has. Which argument is best supported by these observations?

A
All individuals inherit the same potential to play the piano.
B
The ability to play the piano is influenced by genetics as well as the environment.
C
The amount an individual practices each day entirely determines how well they play piano.
D
Most people only need 30 minutes of piano practice each day to master skills.
10

The pedigree traces red-green color blindness. Which family members have red-green color blindness?

Question illustration
A
Sam, Tim, Bella, and Joshua
B
Lisa and Monica
C
Ben, Jenny, Mike, Carol, Katie, and Chris
D
Sam, Joshua, and Tim
11

Which scenario breaks the law of segregation?

A
a gamete contains the father’s allele
B
the gametes produced each have 1 allele after meiosis II
C
a gamete produced has 2 of the same alleles after meiosis II
D
the gamete fertilized has the dominant trait
12

Which career combines DNA technology and medicine?

A
nutriceuticals
B
paternity testing
C
environmental studies
D
genetics
13

If Mendel had crossed a true breeding dominant plant with a true breeding recessive plant, in which of the three generations is the recessive trait visible?

A
F1 generation only
B
P generation only
C
F1 generation and F2 generation
D
P generation and F2 generation
14

Which represents the cross between parent plants if one is heterozygous and has yellow-colored pods and the other is homozygous and has green-colored pods?

A
Yy ´ yy
B
YY ´ yy
C
Yy ´ Yy
D
yy ´ yy
15

Mendel was able to study seven traits in all the pea plants in each generation. Which of his hypotheses allowed him to analyze each trait separately?

A
If two different alleles for a gene occur together, one of the alleles may be expressed while the other is hidden.
B
When gametes are formed, each gamete carries only one allele for the gene.
C
There are alternate versions of a alleles called genes.
D
For each inherited trait, there is only one copy of the gene that codes for that trait.

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