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Practice Test Answers

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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
3

Which best describes biotechnology?

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

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
cap p generation only
B
cap f sub 1 generation and cap f sub 2 generation
C
cap p generation and cap f sub 2 generation
D
cap f sub 1 generation only
5

The Punnett square predicts the ratio of genotypes in the offspring based on the genotypes of the parents. Which Punnett square represents a cross between a mom who is heterozygous for dimples and a dad who is homozygous for no dimples?

A
Image with description A Punnett square is shown. The columns are labeled Upper D and d. The rows are labeled d and d. Clockwise from upper left the boxes contain: Upper D d, d d, d d, Upper D d.
B
Image with description A Punnett square is shown. The columns are labeled Upper D and d. The rows are labeled Upper D and d. Clockwise from upper left the boxes contain: Upper D Upper D, Upper D d, d d, UpperD d.
C
Image with description A Punnett square is shown. The columns are labeled Upper D and Upper D. The rows are labeled Upper D and Upper D. Clockwise from upper left the boxes contain: Upper D Upper D, Upper D Upper D, Upper D Upper D, Upper D Upper D.
D
Image with description A Punnett square is shown. The columns are labeled Upper D and Upper D. The rows are labeled d and d. Clockwise from upper left the boxes contain: Upper D d, Upper D d, Upper D d, Upper D d.
6

Which scenario breaks the law of segregation?

A
the gametes produced each have 1 allele after meiosis II
B
a gamete produced has 2 of the same alleles after meiosis II
C
a gamete contains the father’s allele
D
the gamete fertilized has the dominant trait
7

A company has many genetically engineered poplar trees around its factories. Which best describes the poplar trees?

A
They have transferred their genes to a nontarget species.
B
They are being used for disease resistance.
C
They are being used for phytoremediation.
D
They have reduced the effectiveness of pesticides.
8

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

A
have two copies of a gene from one parent.
B
have two alleles for the gene.
C
can self-pollinate.
D
have two recessive traits.
10

Which are different forms of the same gene?

A
phenotypes
B
genotypes
C
alleles
D
traits
12

Who has hemophilia in the pedigree that is shown?

A
John and Ann
B
Fred and Luke
C
Ann and Marie
D
John, Charles, Jack, and Irene
14

Based on the information in the graph, which is most likely true about farming in 2005?

A
More crops needed to be sprayed with herbicides.
B
Fewer crops were grown with herbicides.
C
Fewer crops were eaten by pests.
D
More crops needed to be sprayed with pesticides.

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