AnswersEAP-Biology B CRUnit Test

Unit Test — Unit test Answers

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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?

A
Only positive outcomes can result from new technology in science.
B
Scientists should conduct long-term studies of DNA technology to determine the consequences.
C
There is no connection because they are different technologies.
D
Scientists should not use new technology; they should use the methods for pest control that are already available.
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Which type of scientific statement is defined as a hypothesis or group of hypotheses that can be accepted as true based on repeated experimentation with similar results?

A
hypothesis
B
theory
C
law
D
probability
23

A scientist is studying fruit fly wings. Straight wings are dominant, and curly wings are recessive. Which statement correctly describes the F1 generation if a straight-winged parent is crossed with a curly-winged parent and if both parents are true breeding?

A
The offspring will have two genes for straight wings.
B
The offspring will produce only gametes that have genes for curly wings.
C
The offspring will have one allele for straight wings and one allele for curly wings.
D
The offspring will have only one kind of allele for the gene that determines wing type.
24

In the F2 generation of Mendel’s crosses,

A
all plants had the dominant trait.
B
half of the plants had the dominant allele.
C
all plants had both the dominant and recessive alleles.
D
one in four plants had two alleles for the recessive trait.
25

In peas, yellow seed color (Y) is dominant to green seed color (y). A homozygous green seed pea plant is crossed with a heterozygous yellow seed pea plant. What is the predicted phenotypic ratio of the offspring based on seed color?

A
50 percent yellow, 50 percent green
B
50 percent YY, 50 percent yy
C
100 percent yellow, 0 percent green
D
100 percent Yy, 0 percent yy

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