Name:     ID: 
 
    Email: 

Mendelian Genetics Quiz 2 Even

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 
 
mendelian_genetics__files/i0020000.jpg
Figure 12-3
 

 1. 

According to the pedigree in Figure 12-3, how many of the offspring in the III generation show the normal trait?
a.
5
c.
4
b.
1
d.
2
 

 2. 

What is the probable mode of inheritance for the normal trait in Figure 12-3?
a.
polygenic
c.
sex linkage
b.
multiple alleles
d.
simple dominant
 

 3. 

Based on Figure 12-3, what do you know about individual III-1's mother?
a.
She was a carrier.
c.
She was homozygous dominant.
b.
She had the trait.
d.
She was homozygous recessive.
 
 
mendelian_genetics__files/i0060000.jpg
Figure 12-1
 

 4. 

What is the relationship between individual I-1 and individual III-2 in Figure 12-1?
a.
grandmother-grandson
c.
great aunt-nephew
b.
mother-son
d.
grandfather-granddaughter
 

 5. 

What type of inheritance pattern does the trait represented by the shaded symbols in Figure 12-1 illustrate?
a.
multiple alleles
c.
sex-linked
b.
codominance
d.
incomplete dominance
 

 6. 

Refer to Figure 12-1. 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.
25%
b.
50%
d.
75%
 

 7. 

For the trait being followed in the pedigree, individuals II-1 and II-4 in Figure 12-1 can be classified as _____.
a.
mutants
c.
homozygous recessive
b.
carriers
d.
homozygous dominant
 

 8. 

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

 9. 

A man heterozygous for blood type A marries a woman heterozygous for blood type B. The chance that their first child will have type O blood is _____.
a.
75%
c.
25%
b.
0%
d.
50%
 

 10. 

The blood types A, B, AB, and O are the result of _____ inheritance.
a.
multiple allelic
c.
polygenic
b.
sex-linked
d.
simple dominant
 

 11. 

Two healthy parents produce a child with the genetic disorder of cystic fibrosis, which is the result of a recessive gene. What would be the best explanation for this inheritance?
a.
This is not the result of a genetic disorder.
b.
Both parents carried the recessive gene for cystic fibrosis.
c.
Cystic fibrosis is a chromosomal mutation that occurred during development and is not related to the parental genotypes.
d.
Cystic fibrosis is caused by a mutation in the 21st pair of chromosomes.
 

 12. 

Royal hemophilia is the result of _____ inheritance.
a.
sex-linked
c.
simple dominant
b.
multiple allelic
d.
polygenic
 

 13. 

A child is diagnosed with a rare genetic disease. Neither parent has the disease. How might the child have inherited the disorder?
a.
The disorder is dominant and was carried by a parent.
b.
The disorder is recessive and carried by both parents.
c.
The disorder is sex linked and inherited only from the father.
d.
The disorder could occur only as a mutation in the child because neither parent had the disease.
 

 14. 

Both hemophilia and red-green color blindness are _____.
a.
located on the Y chromosome
c.
inherited only from the mother
b.
caused by a dominant gene
d.
sex-linked conditions
 

 15. 

Which of the following genetic disorders can be detected by karyotyping?
a.
Down syndrome
b.
hemophilia and cystic fibrosis
c.
Tay-Sachs disease and phenylketonuria
d.
Klinefelter syndrome and sickle-cell anemia
 

 16. 

According to Figure 12-5, what is the chance that individual A will be afflicted with Huntington's?
mendelian_genetics__files/i0190000.jpg
Figure 12-5
a.
50%
c.
100%
b.
75%
d.
25%
 

 17. 

Because the gene for red-green color blindness is located on the X chromosome, it is normally not possible for a _____.
a.
color blind father to pass the gene on to his daughter
b.
carrier mother to pass the gene on to her son
c.
color blind father to pass the gene on to his son
d.
carrier mother to pass the gene on to her daughter
 

 18. 

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

 19. 

What phenotype is depicted in Figure 12-8?
mendelian_genetics__files/i0220000.jpg
Figure 12-8
a.
A
c.
AB
b.
O
d.
B
 



 
Submit          Reset Help