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Bio 6D - Genetic variation in plants and animals (Chapter 14)

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

 1. 
In pea plants, inflated pods (R) are dominant to constricted pods (r). Which of the following crosses is a testcross?
a.
Rr x Rr
c.
RR x rr
b.
RR x RR
d.
RR x Rr
 

 2. 
If a female fruit fly heterozygous for red eyes (XRXr) crossed with a white-eyed male (XrY), what percent of their offspring would have white eyes?
a.
0%
c.
50%
b.
75%
d.
25%
 

 3. 
The 23rd pair of chromosomes that differ in males and females are called _____.
a.
sex chromosomes
c.
autosomes
b.
polygenes
d.
multiple alleles
 
 
bio6dglencoe-21_files/i0050000.jpg
 

 4. 
What is the relationship between individual I-1 and individual III-2 in Figure 14-1?
a.
great aunt-nephew
c.
grandfather-granddaughter
b.
grandmother-grandson
d.
mother-son
 

 5. 
What type of inheritance pattern does the trait represented by the shaded symbols in Figure 14-1 illustrate?
a.
multiple alleles
c.
codominance
b.
incomplete dominance
d.
sex-linked
 

 6. 
Refer to Figure 14-1. If individual III-2 marries a person with the same genotype as individual I-1, what is the chance that one of their children will be afflicted with hemophilia?
a.
25%
c.
75%
b.
50%
d.
0%
 

 7. 
Which of the bar graphs shown below represents what the phenotypic frequencies might be for polygenic inheritance?
a.
bio6dglencoe-21_files/i0090000.jpg
c.
bio6dglencoe-21_files/i0090001.jpg
b.
bio6dglencoe-21_files/i0090002.jpg
d.
bio6dglencoe-21_files/i0090003.jpg
 

 8. 
The type of inheritance shown when a red-flowering plant is crossed with a white-flowering plant and only pink-flowering plants are produced is _____.
a.
incomplete dominance
c.
codominance
b.
inbreeding
d.
polygenic inheritance
 

 9. 
A trait controlled by four alleles is said to have _____.
a.
autosomes
c.
homologous alleles
b.
multiple alleles
d.
hybridization
 

 10. 
A cross between a white rooster and a black hen results in 100% blue Andalusian offspring. When two of these blue offspring are mated, the probable phenotypic ratio seen in their offspring would be _____.
a.
75% blue, 25% white
c.
25% black, 50% blue, 25% white
b.
75% black, 25% white
d.
100% blue
 



 
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