Name: 
 

Genetics


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

 1. 
Genes are found on
a.
chromosomes.
c.
proteins.
b.
alleles.
d.
anthers.
 

 2. 
The process that produces sex cells is
a.
mitosis.
c.
meiosis.
b.
photosynthesis.
d.
probability.
 

 3. 
The passing of traits from parents to offspring is
a.
probability.
c.
recessive.
b.
heredity.
d.
meiosis.
 

 4. 
If you cross a white flower (with the genotype pp) with a purple flower (with the genotype PP), the possible genotypes of the offspring are
a.
PP and pp.
c.
all PP.
b.
all Pp.
d.
all pp.
 

 5. 
For the above cross, what would the phenotypes be?
a.
all white
c.
all purple
b.
all tall
d.
1/2 white, 1/2 purple
 

 6. 
In meiosis,
a.
the chromosomes are copied twice.
b.
the nucleus divides once.
c.
four cells are produced from a single cell.
d.
All of the above
 

 7. 
Probability is
a.
always expressed as a ratio.
b.
a 50% chance that an event will occur.
c.
the mathematical chance that an event will occur.
d.
a 3:1 chance that an event will occur.
 

 8. 
Two forms of the same gene are known as
a.
alleles.
c.
genotypes.
b.
chromosomes.
d.
sex cells.
 

 9. 
If you cross two rabbits that have the genotype Bb, how many possible genotypes can be found in the offspring?
a.
one
c.
three
b.
two
d.
four
 

 10. 
How many chromosomes are present in a normal human sex cell?
a.
22
c.
46
b.
23
d.
92
 

 11. 
If a purple flower with the genotype Pp (P = purple; p = white) self-pollinates, the ratio of purple offspring to white offspring would be
a.
three purple:one white.
c.
one purple:three white.
b.
two purple:two white.
d.
four purple:zero white.
 

 12. 
The set of instructions for each characteristic donated by the parent to the offspring is called
a.
mitosis.
c.
heredity.
b.
genes.
d.
meiosis.
 

 13. 
How many sets of instructions for each characteristic does a fertilized egg receive from EACH parent?
a.
1
c.
3
b.
2
d.
4
 

 14. 
The inherited combination of alleles is known as the offspring’s
a.
heredity.
c.
phenotype.
b.
pedigree.
d.
genotype.
 

 15. 
The organism’s appearance is known as its
a.
heredity.
c.
phenotype.
b.
pedigree.
d.
genotype.
 

 16. 
Which of the following are traits that you probably inherited?
a.
your taste in clothing
c.
your eye color
b.
your favorite music
d.
All of the above
 

 17. 
____ used plants to study the way traits are passed from parents to offspring.
a.
Mendel
c.
Sutton
b.
Punnett
d.
Allele
 

 18. 
The trait that always appears in first-generation offspring is the
a.
genotype.
c.
dominant trait.
b.
phenotype.
d.
recessive trait.
 

 19. 
The trait that seems to recede in the background in first-generation offspring is the
a.
genotype.
c.
dominant trait.
b.
phenotype.
d.
recessive trait.
 

 20. 
The chromosomes in each pair of chromosomes are called
a.
homologous chromosomes.
c.
homogenous chromosomes.
b.
heterogeneous chromosomes.
d.
homeomorphic chromosomes.
 
 
Study the diagram of the stages of meiosis and answer the questions that follow.
nar001-1.jpg
 

 21. 
What occurs at stage 1 of meiosis?
a.
Pairs of homologous chromosomes line up at the cell's equator.
b.
The chromosomes separate from their homologous partners and move to opposite poles of the cell.
c.
The nuclear membrane re-forms, and the cell divides, the paired chromatids remain joined.
d.
Each chromosome makes an identical copy of itself, forming chromatids.
 

 22. 
What occurs at stage 2 of meiosis?
a.
Pairs of homologous chromosomes line up at the cell's equator.
b.
The chromosomes separate from their homologous partners and move to opposite poles of the cell.
c.
The nuclear membrane re-forms, and the cell divides, the paired chromatids remain joined.
d.
Each chromosome makes an identical copy of itself, forming chromatids.
 

 23. 
What occurs at stage 3 of meiosis?
a.
Pairs of homologous chromosomes line up at the cell's equator.
b.
The chromosomes separate from their homologous partners and move to opposite poles of the cell.
c.
The nuclear membrane re-forms, and the cell divides, the paired chromatids remain joined.
d.
Each chromosome makes an identical copy of itself, forming chromatids.
 

 24. 
What occurs at stage 4 of meiosis?
a.
Pairs of homologous chromosomes line up at the cell's equator.
b.
The chromosomes separate from their homologous partners and move to opposite poles of the cell.
c.
The nuclear membrane re-forms, and the cell divides, the paired chromatids remain joined.
d.
Each chromosome makes an identical copy of itself, forming chromatids.
 

 25. 
What occurs at stage 5 of meiosis?
a.
The chromosomes line up at the equator of each cell.
b.
Each cell contains one member of each homologous chromosome pair. The chromosomes are not copied again.
c.
The nuclear membrane forms around the separated chromosomes, and the cells divide.
d.
The chromatids pull apart and move to opposite ends of the cell.
 

 26. 
What occurs at stage 6 of meiosis?
a.
The chromosomes line up at the equator of each cell.
b.
Each cell contains one member of each homologous chromosome pair. The chromosomes are not copied again.
c.
The nuclear membrane forms around the separated chromosomes, and the cells divide.
d.
The chromatids pull apart and move to opposite ends of the cell.
 

 27. 
What occurs at stage 7 of meiosis?
a.
The chromosomes line up at the equator of each cell.
b.
Each cell contains one member of each homologous chromosome pair. The chromosomes are not copied again.
c.
The nuclear membrane forms around the separated chromosomes, and the cells divide.
d.
The chromatids pull apart and move to opposite ends of the cell.
 

 28. 
What occurs at stage 8 of meiosis?
a.
The chromosomes line up at the equator of each cell.
b.
Each cell contains one member of each homologous chromosome pair. The chromosomes are not copied again.
c.
The nuclear membrane forms around the separated chromosomes, and the cells divide.
d.
The chromatids pull apart and move to opposite ends of the cell.
 

 29. 
Humans produce sex cells through a process called
a.
mitosis.
c.
meiosis.
b.
cytokinesis.
d.
binary fission.
 

 30. 
Bacteria reproduce through an asexual process called
a.
mitosis.
c.
meiosis.
b.
cytokinesis.
d.
binary fission.
 

 31. 
A genetic cross results in 882 plants with smooth pods and 299 plants with bumpy pods. Which of the following calculates the ratio of smooth pods to bumpy pods?
a.
mc031-1.jpg
c.
mc031-3.jpg
b.
mc031-2.jpg
d.
mc031-4.jpg
 

 32. 
A genetic cross resulted in 6,002 plants with yellow seeds and 2,001 plants with green seeds. Which of the following calculates the ratio of yellow seeds to green seeds?
a.
mc032-1.jpg
c.
mc032-3.jpg
b.
mc032-2.jpg
d.
mc032-4.jpg
 

 33. 
A genetic cross resulted in 5,474 plants with round seeds and 1,850 plants with wrinkled seeds. Which of the following calculates the ratio of round seeds to wrinkled seeds?
a.
mc033-1.jpg
c.
mc033-3.jpg
b.
mc033-2.jpg
d.
mc033-4.jpg
 

 34. 
____ developed a square that is used to visualize all the possible combinations of alleles in offspring resulting from a genetic cross.
a.
Mendel
c.
Sutton
b.
Punnett
d.
Allele
 
 
Use the Punnett square below to answer the questions that follow.
In pea plants, the trait for tallness (T) is dominant to the trait for being short (t).

nar002-1.jpg
 

 35. 
In the Punnett square above, the offspring in square 1 would have the genotype
a.
TT.
c.
TtT.
b.
Tt.
d.
tt.
 

 36. 
In the Punnett square above, the offspring in square 2 would have the genotype
a.
TT.
c.
TtT.
b.
Tt.
d.
tt.
 

 37. 
In the Punnett square above, the offspring in square 3 would have the genotype
a.
TT.
c.
TtT.
b.
Tt.
d.
tt.
 

 38. 
In the Punnett square above, the offspring in square 4 would have the genotype
a.
TT.
c.
TtT.
b.
Tt.
d.
tt.
 

 39. 
Offspring from which of the following squares would be short?
a.
2
c.
4
b.
3
d.
All of the above
 

 40. 
Offspring from which of the following squares would be tall?
a.
1
c.
3
b.
2
d.
All of the above
 



 
Check Your Work     Start Over