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