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AP Bio Ch. 14 Study Guide Test Your Knowledge

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
According to Mendel’s law of segregation.
a.
there is a 50% probability that a gamete will get a dominant allele
b.
allele pairs segregate independently of other pairs of alleles in gamete formation
c.
allele pairs seperate in gamete formation
d.
the laws of probablity determine gamete formation
e.
there is a 3:1 ratio in the F2 generation
 

 2. 
The F2 generation
a.
has a phenotypic ratio of 3:1
b.
is the result of the self-fertilization or crossing of F1 individuals
c.
can be used to determine the genotype of individuals with the dominant phenotype
d.
has phenotypic ratio that equals its genotypic ratio
e.
has 16 different genotypic possibilities
 

 3. 
A 1:1 phenotypic ratio in a testcross indicates that
a.
the alleles are dominant
b.
one parent must have been homozygous dominant
c.
the parent with a dominant phenotype was a heterozygote
d.
the alleles segregated independently
e.
the alleles are codominant
 

 4. 
Which phase of meiosis is most directly related to the law of independent assortment?
a.
prophase I
b.
prophase II
c.
metaphase I
d.
metaphase II
e.
anaphase II
 

 5. 
After obtaining two heads from two tosses of a coin, the probability of obtaining a head on the next toss is
a.
1/2
b.
1/4
c.
1/8
d.
3/8
e.
3/4
 

 6. 
The probability of tossing three coins simultaneously and obtaining three heads is
a.
1/2
b.
1/4
c.
1/8
d.
3/8
e.
3/4
 

 7. 
The probability of tossing three coins simultaneously and obtaining two heads and one tail is
a.
1/2
b.
1/4
c.
1/8
d.
3/8
e.
3/4
 

 8. 
In guinea pigs, the brown coat color allele (B) is dominant over red (b), and the solid color allele (S) is dominant over spotted (s). The F1 offspring of a cross between true-breeding brown, solid colored guinea pigs and red, spotted pigs are crossed. What proportion of their offspring (F2) would be expected to be red and solid colored?
a.
1/9
b.
1/16
c.
3/16
d.
9/16
e.
3/4
 

 9. 
The base height of the dingdong plant is 10 cm. Four genes contribute to the height of the plant, and each dominant allele contributes 3 cm to height. If you cross a 10-cm plant (quadruply homozygous recessive) with a 34-cm plant, how many phenotypic classes will there be in the F2?
a.
4
b.
5
c.
8
d.
9
e.
64
 

 10. 
You think that two alleles for coat color in mice show incomplete dominance. What is the best and simplest cross to perform in order to test your hypothesis?
a.
a testcross of a homozygous recessive mouse with a mouse of an unknown genotype
b.
a cross of F1 mice to look for a 1:2:1 ratio in the offspring
c.
a reciprocal cross in which the sex of the mice of each coat color is reversed
d.
a cross of true breeding mice of different colors to look for an intermediate phenotype in the F1
e.
a cross of F1 mice to look for a 9:7 ratio in the offspring
 

 11. 
A mother with type B blood has two children, one with type A blood and one with type O blood. Her husband has type O blood. Which of the following can you conclude from this information?
a.
The husband could not have fathered either child
b.
The husband could have fathered both children
c.
The husband must be the father of the child with type O blood and could be the father of the type A child
d.
Neither the mother nor the husband could be the biological parent of the the type A child
e.
The husband could be the father of the child with type O blood, but not the type A child
 

 12. 
A dominant allele P causes the production of a purple pigment; pp individuals are white. A dominant allele C is also required for color production; cc individuals are white. What proportion of offspring will be purple from ppCc X PpCc cross?
a.
1/8
b.
3/8
c.
1/2
d.
3/4
e.
none
 

 13. 
Carriers of a genetic disorder
a.
are indicated by solid symbols on a family pedigree
b.
are heterozygous at the genetic locus for the disorder
c.
will produce children with the disease
d.
are often the result of consanguineous matings
e.
have a homozygous recessive genotype but do not phenotypically exhibit the disease
 

 14. 
Which of the following human diseases is inherited as a simple recessive trait?
a.
cystic fibrosis
b.
cancer
c.
Huntington’s disease
d.
achondroplasia
e.
cardiovascular disease
 

 15. 
A multifactorial disorder
a.
can usually be traced to consanguineous matings
b.
is caused by recessively inherited lethal genes
c.
has both genetic and environmental causes
d.
has a collection of symptoms traceable to an epistatic gene
e.
is usually associated with quantitative traits
 

 16. 
Which of the following procedures would be best for identifying a chromosomal abnormality in a fetus?
a.
chorionic villus sampling and karyotyping
b.
biochemical tests
c.
 ultrasound
d.
fetoscopy
e.
analysis of fetal DNA
 



 
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