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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. 
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.
50%
c.
25%
b.
0%
d.
75%
 

 2. 
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
 

 3. 
Which of the bar graphs shown below represents what the phenotypic frequencies might be for polygenic inheritance?
a.
bio6dglencoe-09_files/i0040000.jpg
c.
bio6dglencoe-09_files/i0040001.jpg
b.
bio6dglencoe-09_files/i0040002.jpg
d.
bio6dglencoe-09_files/i0040003.jpg
 
 
bio6dglencoe-09_files/i0050000.jpg
 

 4. 
For the trait being followed in the pedigree, individuals II-1 and II-4 in Figure 14-1 can be classified as _____.
a.
homozygous dominant
c.
homozygous recessive
b.
carriers
d.
mutants
 

 5. 
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.
0%
c.
50%
b.
25%
d.
75%
 

 6. 
What type of inheritance pattern does the trait represented by the shaded symbols in Figure 14-1 illustrate?
a.
incomplete dominance
c.
sex-linked
b.
codominance
d.
multiple alleles
 

 7. 
The 23rd pair of chromosomes that differ in males and females are called _____.
a.
autosomes
c.
polygenes
b.
multiple alleles
d.
sex chromosomes
 

 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.
codominance
c.
polygenic inheritance
b.
incomplete dominance
d.
inbreeding
 

 9. 
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.
100% blue
c.
75% black, 25% white
b.
75% blue, 25% white
d.
25% black, 50% blue, 25% white
 

 10. 
A trait controlled by four alleles is said to have _____.
a.
hybridization
c.
homologous alleles
b.
multiple alleles
d.
autosomes
 



 
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