Biology, Eighth Edition (Raven)

Chapter 12: Patterns of Inheritance

Pre Test

1
Mendel was able to use pea plants as an experimental system to study inheritance because (p. 222)
A)There were many varieties with distinct traits that could be counted.
B)They keep their seeds within a pod.
C)True-breeding stocks could be developed.
D)Two of the above made pea plants useful.
E)All of the above made pea plants useful.
2
True or false: A 1:2:1 ratio describes the genotype which arises from a monohybrid cross of two heterozygous individuals. (p. 224)
A)True
B)False
3
How is it possible to use a monohybrid cross to illustrate independent assortment of the chromosomes? (p. 227)
A)You could do large numbers of crosses of one trait using many sets of parents and then statistically analyze the results.
B)You could do large numbers of crosses of two traits (one-at-a-time using monohybrid methodology) and statistically analyze the results.
C)You could do large numbers of crosses of three traits (one-at-a-time using monohybrid methodology) and statistically analyze the results.
D)All of these methods would demonstrate independent assortment of chromosomes.
E)None of these methods would demonstrate independent assortment of chromosomes.
4
What is the probability of rolling three sixes by tossing a die three times? (p. 228)
A)1/6 + 1/6 + 1/6
B)1/6 X 1/6 X 1/6
C)1/2 X 1/6
D)1/6
E)1/18
5
A testcross always involves crossing a heterozygote with a homozygote. (p. 229)
A)True
B)False
6
Two genes are involved in the same biochemical pathway and are investigated using a dihybrid cross. They interact in such a way that one (gene A) interferes with the expression of the other (gene B). We call this phenomenon (p. 234)
A)continuous variation
B)incomplete dominance
C)codominance
D)epistasis
E)polygenic
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