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Chapter 10 Test Study Questions



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

 1. 

When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _____ occurs.
a.
crossing over
c.
hybridization
b.
mutagenesis
d.
fertilization
 

 2. 

Crossing over results in a _____.
a.
female genotype
c.
genetic recombination
b.
male genotype
d.
phenotype replication
 

 3. 

The _____ produced by each parent are shown along the sides of a Punnett square.
a.
zygotes
c.
gametes
b.
offspring
d.
hybrids
 

 4. 

A useful device for predicting the possible offspring of crosses between different genotypes is the _____.
a.
law of dominance
c.
Punnett square
b.
law of independent assortment
d.
testcross
 

 5. 

Which of the following describes an organism that has the genotype Bb?
a.
homozygous
c.
inbreed
b.
heterozygous
d.
all of these
 

 6. 

Mendel's law of segregation states that during meiosis, the factors that control each trait separate, and only _____ from each pair is/are passed to the offspring.
a.
one factor
c.
two factors
b.
the dominant trait
d.
the recessive trait
 

 7. 

The law of independent assortment states that the inheritance of alleles for one trait is not affected by the inheritance of alleles for a different trait if the genes for the traits are on _____.
a.
separate chromosomes
c.
the same chromosome
b.
homologous chromosomes
d.
homozygous chromosomes
 

 8. 

The passing on of traits from parents to offspring is called _____.
a.
genetics
c.
inbreeding
b.
heredity
d.
gene splicing
 

 9. 

The statement: "In meiosis, the way in which a chromosome pair separates does not affect the way other pairs separate," is another way of expressing Mendel's law of _____.
a.
dominance
c.
independent assortment
b.
first filial generations
d.
Punnett squares
 

 10. 

Cells containing two alleles for each trait are described as _____.
a.
haploid
c.
diploid
b.
gametes
d.
homozygous
 

 11. 

The gamete that contains genes contributed only by the mother is _____.
a.
the sperm
c.
a zygote
b.
an egg
d.
dominant
 

 12. 

Pollination can best be described as _____.
a.
the fusing of the egg nucleus with the pollen nucleus
b.
the transfer of the male pollen grain to the female organ
c.
the formation of male and female sex cells
d.
the type of cell division that produces diploid gametes
 

 13. 

A couple has two children, both of whom are boys. What is the chance that the parents' next child will be a boy?
a.
0%
c.
25%
b.
50%
d.
75%
 

 14. 

A dog's phenotype can be determined by _____.
a.
looking at the dog's parents
b.
examining the dog's chromosomes
c.
mating the dog and examining its offspring
d.
looking at the dog
 

 15. 

A female guinea pig homozygous dominant for black fur color is mated with a male homozygous for white fur color. In a litter of eight offspring, there would probably be _____.
a.
8 black guinea pigs
b.
4 black and 4 white guinea pigs
c.
2 black, 4 gray, and 2 white guinea pigs
d.
8 white guinea pigs
 

 16. 

The numbers in Figure 10-1 represent the chromosome number found in each of the dog cells shown. The processes that are occurring at A and B are _____.
chapter_10_test_stu_files/i0170000.jpg
Figure 10-1
a.
mitosis and fertilization
c.
mitosis and pollination
b.
meiosis and fertilization
d.
meiosis and pollination
 

 17. 

Genes located on homologous chromosomes may have alternate forms that control different forms of a trait. These alternate forms of a gene are called _____.
a.
alleles
c.
phenotypes
b.
centromeres
d.
gametes
 

 18. 

A white mouse whose parents are both white produces only brown offspring when mated with a brown mouse. The white mouse is most probably _____.
a.
homozygous recessive
c.
homozygous dominant
b.
heterozygous
d.
haploid
 

 19. 

In chickens, rose comb (R) is dominant to single comb (r). A homozygous rose-combed rooster is mated with a single-combed hen. All of the chicks in the F1 generation were kept together as a group for several years. They were allowed to mate only within their own group. What is the expected phenotype of the F2 chicks?
a.
100% rose comb
b.
75% rose comb and 25% single comb
c.
100% single comb
d.
50% rose comb and 50% single comb
 

 20. 

In mink, brown fur color is dominant to silver-blue fur color. If a homozygous brown mink is mated with a silver-blue mink and 8 offspring are produced, how many would be expected to be silver-blue?
a.
0
c.
6
b.
3
d.
8
 

 21. 

The diagram in Figure 10-2 shows a diploid cell with two homologous pairs of chromosomes. Due to independent assortment, the possible allelic combinations that could be found in gametes produced by the meiotic division of this cell are _____.
chapter_10_test_stu_files/i0220000.jpg
Figure 10-2
a.
Bb, Dd, BB, and DD
c.
BbDd and BDbd
b.
BD, bD, Bd, and bd
d.
Bd and bD only
 

 22. 

Using Figure 10-3, which process would result in the formation of chromosome C from chromosomes A and B?
chapter_10_test_stu_files/i0230000.jpg
Figure 10-3
a.
asexual reproduction
c.
crossing over
b.
independent assortment
d.
segregation
 
 
chapter_10_test_stu_files/i0240000.jpg
Figure 10-5
 

 23. 

According to Figure 10-5, the constricted pod shape is _____.
a.
dominant
c.
segregated
b.
recessive
d.
hybrid
 

 24. 

What is the genotype of generation 1 in Figure 10-5?
a.
II
c.
ii
b.
Ii
d.
I
 

 25. 

What is the phenotype of generation 1 in Figure 10-5?
a.
II
c.
inflated
b.
Ii
d.
constricted
 

 26. 

What is the genotype in the bottom left-hand quadrant in Figure 10-6?
chapter_10_test_stu_files/i0280000.jpg
Figure 10-6
a.
WW
c.
wW
b.
Ww
d.
ww
 
 
chapter_10_test_stu_files/i0290000.jpg
Figure 10-7
 

 27. 

How should the top row of Figure 10-7 read?
a.
MMXX, MMXx, MmXX, MmXx
c.
mMXX, mMXx, mmXX, mmXx
b.
MMxX, MMxx, MmxX, Mmxx
d.
mMxX, mMxx, mmxX, mmxx
 

 28. 

What fraction of this cross will be recessive for both traits?
a.
1/2
c.
1/8
b.
1/4
d.
1/16
 
 
chapter_10_test_stu_files/i0320000.jpg
Figure 10-8
 

 29. 

In Figure 10-8, what gametes will result if there is only a single crossover?
a.
A
c.
C
b.
B
d.
D
 

 30. 

In Figure 10-8, what gamaetes will result if each chromatid crossed with a nonsister chromatid?
a.
A
c.
C
b.
B
d.
D
 



 
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