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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
purebreds
B
genes
C
recessives
D
parents
2) Scientists call an organism that has two different alleles for a trait a _____.
A
factor
B
hybrid
C
trait
D
purebred
3) An organism’s physical appearance is its _____.
A
co-dominance
B
phenotype
C
heterozygous
D
genotype
4) Which term refers to physical characteristics that are studied in genetics (for ex. blue eyes)?
A
generations
B
offspring
C
hybrids
D
traits
5) The different forms of a gene are called ______?
A
alleles
B
traits
C
factors
D
masks
6) What does the notation tt mean to a geneticist?
A
two dominant allels
B
one dominant and one recessive allele
C
at least one dominant allele
D
two recessive allels
7) An organisms genotype is its ______.
A
physical appearance
B
stem height
C
genetic makeup
D
feather color
8) A structure in the cell’s nucleus that contains the genetic information or DNA _____.
A
allele
B
link
C
chromosome
D
gene
9) The scientific study of heredity _______.
A
botany
B
genetics
C
ecology
D
chemistry
10) A cross that shows the genetic crossing of a single trait is a _____.
A
cross roads
B
trait crossing
C
di-hybrid cross
D
mono-hybrid cross
11) What does a Punnett square show?
A
Only the recessive alleles in a genetic cross
B
All of Mendel’s discoveries about genetic crosses
C
all the possible outcomes of a genetic cross
D
Only the dominant alleles in a genetic cross
12) Which trait is controlled by a dominant allele? : W= white flowers, w=purple flowers
A
pink
B
purple
C
white
D
blue
13) Which trait is controlled by a recessive allele? : W= white flowers, w=purple flowers
A
pink
B
white
C
blue
D
purple
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
chromosomes
B
dominant traits
C
genotype
D
phenotype
15) What units found on the chromosomes are responsible for an individual’s inherited characteristics?
A
proteins
B
genes
C
mitochondria
D
phenotype
16) Every person who inherits an allele for Huntington’s disease will develop the disease. This condition must be _____.
A
recessive
B
heterozygous
C
hybrid
D
dominant
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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