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WorksheetsUNIT 5: Genetics
Total questions: 58
Worksheet time: 53mins
Which of the following is a result of a nondisjunction?
Klinefleter syndrome
Sickle cell anemia
Cystic fibrosis
Hemophilia
Which of the following best describes the cause of cystic fibrosis?
a mutated blood clotting protein
a mutated transport protein
an extra 21st chromosome
an extra 13th chromosome
Which of the following is an autosomal recessive disorder?
Huntington's disease
sickle cell anemia
colorblindness
Hemophilia
Which of the following is a autosomal dominant disorder?
Huntington's
Cystic fibrosis
Hemophilia
Sickle cell anemia
Which of the following is a sex-linked disorder?
Hemophilia
Sickle cell anemia
Cystic fibrosis
Huntington's
Which of the following is a chromosomal mutation?
insertion
frameshirt
substitution
nondisjunction
Which of the following cause frameshift mutations?
insertions and deletions
translocations and nondisjunctions
duplicaitons and deletions
inversions and substitutions
Which of the following is NOT a chromosomal disorder?
Turner's syndrome
Downs syndrome
Klinefelter's syndrome
Huntingdon's
Which of the following is NOT caused by a gene mutation?
Turner's syndrome
Sickle cell anemia
Cystic fibrosis
Hemophilia
Identify the substitution mutation that results in an abnormally shaped protein and that causes a reduced ability to bind and transport oxygen.
Cystic fibrosis
Sickle cell anemia
Huntington's
Hemophilia
What is trisomy 21
Kleinfelter's syndrom
sickle cell
Down syndrome
cystic fibrosis
Hair color, height, eye color and freckles are examples of human traits. What do we call the physical expression of the genetic material of an organism?
genetics
heredity
genotype
phenotype
A segment of DNA that codes for a trait
gene
allele
chromosome
chromatid
Human gametes contain how many chromosomes?
46
23
12
28
How many chromosomes are shown in a normal human karyotype?
2
23
44
46
Which of the following are shown in a karyotype ?
homologous chromosomes
sex chromosome
autosomes
all of the above
What is the approximate probability that a human offspring will be female?
10%
25%
50%
75%
Colorblindness is more common in males than females because
fathers pass the allele for colorblindness to their sons only
the allele for colorblindness is located on the Y chromosome
the allele for colorblindness is recessive and located on the X chromosome
males who are colorblind have copies of the allele for colorblindness.
Who is more likely to inherit and be affected by sex-linked disorders?
Males
Females
Equal chances
If hemophilia is an X-linked recessive disorder, what genotype would a carrier female have?
XH XH
XH Xh
Xh Xh
If hemophilia is an X-linked recessive disorder, what genotype would a female with hemophilia have?
XH XH
XH Xh
Xh Xh
Xh Y
In the punnett square below, what belongs in the missing square
In fruit flies, normal wings (N) are dominant to short, vestigial wings (n). If two heterozygous normal fruit flies mates and produce 400 offspring, how many are expected to have short wings?
400
300
200
100
0
Long tongues (T) are dominant to short tongues in green tree frogs. What is the probability that two frogs that are heterozygous for long tongues could produce offspring with long tongues?
100%
75%
50%
25%
0%
In guinea pigs, short hair (H) is dominant to long hair. If a short-haired guinea pig and a long-haired guinea pig have 220 offspring and 105 have long hair, what are the parental genotypes?
HH x Hh
hh x hh
Hh x Hh
HH x hh
Hh x hh
In sheep, black fur (B) is dominant to white fur. Two sheep heterozygous for black fur mate. What is the expected genotypic ratio of their offspring?
3:1
1:1
1:2:1
4:0
Cystic fibrosis is a recessive genetic disorder. A man and a woman are both carriers for cystic fibrosis. What is the probability they will have a child that also carries the cystic fibrosis allele?
0%
25%
50%
75%
