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Genetics
Test Description: Review
Instructions: Answer all questions to get your test result.
1) Factors that control traits are called ________?
A
genes
B
parents
C
recessives
D
purebreds
2) Scientists call an organism that has two different alleles for a trait a _____.
A
trait
B
hybrid
C
factor
D
purebred
3) An organism’s physical appearance is its _____.
A
co-dominance
B
genotype
C
heterozygous
D
phenotype
4) Which term refers to physical characteristics that are studied in genetics (for ex. blue eyes)?
A
generations
B
traits
C
offspring
D
hybrids
5) The different forms of a gene are called ______?
A
masks
B
alleles
C
traits
D
factors
6) What does the notation tt mean to a geneticist?
A
at least one dominant allele
B
two recessive allels
C
two dominant allels
D
one dominant and one recessive allele
7) An organisms genotype is its ______.
A
genetic makeup
B
physical appearance
C
stem height
D
feather color
8) A structure in the cell’s nucleus that contains the genetic information or DNA _____.
A
link
B
gene
C
allele
D
chromosome
9) The scientific study of heredity _______.
A
chemistry
B
genetics
C
botany
D
ecology
10) A cross that shows the genetic crossing of a single trait is a _____.
A
di-hybrid cross
B
mono-hybrid cross
C
cross roads
D
trait crossing
11) What does a Punnett square show?
A
Only the dominant alleles in a genetic cross
B
Only the recessive alleles in a genetic cross
C
all the possible outcomes of a genetic cross
D
All of Mendel’s discoveries about genetic crosses
12) Which trait is controlled by a dominant allele? : W= white flowers, w=purple flowers
A
white
B
purple
C
pink
D
blue
13) Which trait is controlled by a recessive allele? : W= white flowers, w=purple flowers
A
pink
B
blue
C
purple
D
white
14) By analyzing a blood sample, a doctor can tell a patient whether his or her children might inherit a genetic condition. This is true even if the patient doesn’t have that condition. This type of analysis tells the doctor about a patient’s ______.
A
phenotype
B
chromosomes
C
genotype
D
dominant traits
15) What units found on the chromosomes are responsible for an individual’s inherited characteristics?
A
genes
B
mitochondria
C
phenotype
D
proteins
16) Every person who inherits an allele for Huntington’s disease will develop the disease. This condition must be _____.
A
dominant
B
hybrid
C
recessive
D
heterozygous
17) Brown-eyed parents have two brown-eyed children and one blue-eyed child. This can occur because _____.
A
the combination of parental alleles is the same in each offspring
B
the combination of parental alleles is different in each offspring
C
environmental factors can change eye color
D
all humans carry an allele for blue eyes
*select an answer for all questions
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