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WorksheetsHuman Genetics/Complex Inheritance
Total questions: 27
Worksheet time: 1hrs 4mins
Name
Class
Date
1.
In a certain species of animal, black fur (B) is dominant over tan fur (b).
Which type of dominance does this cross show?
Which type of dominance does this cross show?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
2.
What type of inheritance do two alleles have if their traits blend together?
a)
Incomplete Dominance
b)
Co-Dominance
c)
Mendelian Inheritance
d)
Homozygous Inheritance
3.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
4.
This type of inheritance pattern shows BOTH traits in possible offspring.
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
5.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
6.
Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?
a)
Red
b)
Red and White
c)
White
d)
Pink
7.
How many PAIRS of sex chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
8.
AB blood type is an example of what type of inheritance?
a)
complete dominance
b)
incomplete dominance
c)
codominance
d)
polygenic inheritance
9.
The range of human skin colors is caused by a variety of genes, each of which has at least 2 alleles. This is an example of:
a)
incomplete dominance
b)
codominance
c)
multiple alleles
d)
polygenic inheritance
10.
What are the blood types of the possible children that a woman (type O) and man (type AB) can have? Use a Punnett square if you need to.
a)
O and AB
b)
O and A
c)
O and B
d)
A and B
11.
If a woman has type A blood and her child has type O blood, the father must have which of the following blood types?
a)
A, B, or O
b)
A or O
c)
AB or B
d)
O only
12.
X-linked conditions are more common in men than in women because
a)
The genes associated with the X linked conditions are linked to the X chromosome, which determines maleness.
b)
Men need to inherit only one copy of the recessive allele for the condition to be fully expressed
c)
Women simply do not develop the disease regardless of their genetic composition
d)
The sex chromosomes are more active in men than in women
13.
Based on the Karyotype shown, at which chromosome pair can we identify a genetic disorder?
a)
Chromosome pair 5
b)
sex chromosomes
c)
Chromosome pair 21
d)
There are no chromosomal disorders
14.
Which sex chromosomes would indicate a typical human male?
a)
XX
b)
X
c)
XY
d)
XXY
15.
Photograph of chromosomes grouped in ordered pairs is called a
a)
pedigree
b)
Punnett Square
c)
Venn Diagram
d)
Karyotype
16.
Which genetic disorder or disease is a sex-linked trait and carried on the X chromosome?
a)
Cystic Fibrosis
b)
Sickle-cell Disease
c)
Hemophilia
d)
Down Syndrome
17.
Which disease or disorder is the result of having an extra chromosome?
a)
Cystic Fibrosis
b)
Down Syndrome
c)
Colorblindness
d)
Sickle-cell Disease
18.
Testing the amniotic fluid for birth defects.
a)
Chorionic Villi Sampling
b)
Ultrasound
c)
Amniocentesis
d)
Embryo Test
19.
A test that uses sound waves to create a sonogram.
a)
Amniocentesis
b)
Ultrasound
c)
Germinal Sampling
d)
Chorionic Villi Sampling
20.
A carrier of a genetic disorder who does not show symptoms is most likely to be ___________ to transmit it to offspring.
a)
heterozygous for the trait and able
b)
heterozygous for the trait and unable
c)
homozygous for the trait and able
d)
homozygous for the trait and unable
21.
Dr. Smith's parents have normal hearing. However, Dr. Smith has inherited a form of deafness. Deafness is a recessive trait that is associated with the abnormal allele (d). The allele associated with normal hearing is (D). Dr. Smith's parents could have which of the following genotypes?
a)
DD and dd
b)
dd and dd
c)
Dd and Dd
d)
DD and DD
22.
Many genetic disorders of humans are caused by
a)
multiple alleles
b)
recessive alleles
c)
smoking during pregnancy
d)
a mutation in the zygote
23.
Which of the following best explains why dominant alleles that cause lethal disorders are less common than recessive alleles that cause lethal disorder.
a)
Lethal disorders caused by dominant alleles are usually more severe than lethal disorders caused by recessive alleles.
b)
Unlike lethal disorders caused by recessive alleles, lethal disorders caused by dominant alleles usually cause death of the embryo.
c)
Most individuals carrying a lethal dominant allele have the disorder and die before they reproduce.
d)
The presence of a dominant lethal allele causes sterility.
24.
Amniocentesis and chorionic villus sampling allow for ___________ and ____________ of the fetus so that it can be tested for abnormalities.
a)
imaging...biochemical
b)
imaging...karyotyping
c)
karyotyping...biochemical testing
25.
Which of the following is false?
a)
Results from chorionic villus sampling come faster than from amniocentesis
b)
Chorionic villus sampling is typically performed later in the pregnancy than amniocentesis
c)
Ultrasound imaging has no known risk
d)
The complication rate for chorionic villus sampling is about 2% and for amniocentesis is 1%.
26.
Which term is essentially the opposite of pleiotropy?
a)
multiple alleles
b)
polygenic inheritance
c)
incomplete dominance
d)
codominance
27.
Cystic fibrosis affects the lungs, the pancreas, the digestive system, and other organs, resulting in symptoms ranging from breathing difficulties to recurrent infections. Which of the following terms best describes this?
a)
incomplete dominance
b)
epistasis
c)
multiple alleles
d)
pleiotropy
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