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WorksheetsPedigree Analysis
Total questions: 44
Worksheet time: 44mins
What is a pedigree analysis?
Pedigree analysis is a method used in psychology to analyze family dynamics.
Pedigree analysis is a method used in genealogy to trace a family's ancestry.
Pedigree analysis is a method used in agriculture to improve crop yields.
Pedigree analysis is a method used in genetics to study the inheritance of traits within a family.
Which of the following symbols is used to represent a male in a pedigree?
circle
triangle
star
square
In a pedigree, what does a shaded symbol represent?
An individual without the trait or condition being studied.
An individual who is not related to the rest of the pedigree.
An individual who is deceased.
An individual with the trait or condition being studied.
What does a horizontal line connecting two symbols in a pedigree represent?
A mating or marriage
A sibling relationship
A parent-child relationship
A genetic mutation
In a pedigree, what does a half-shaded symbol represent?
carrier
male
affected individual
homozygous
What is the purpose of a pedigree analysis?
The purpose of a pedigree analysis is to study inheritance patterns and genetic disorders within a family.
The purpose of a pedigree analysis is to identify the age at which genetic disorders develop within a family.
The purpose of a pedigree analysis is to study the environmental factors that influence genetic disorders.
The purpose of a pedigree analysis is to determine the gender of individuals within a family.
In a pedigree, what does a diagonal line through a symbol represent?
alive
deceased
adopted
unrelated
What is the probability of a child inheriting a recessive genetic disorder if both parents are carriers?
25%
10%
75%
50%
In a pedigree, what does a double line connecting two symbols represent?
Adoption
Marriage between cousins
Consanguineous marriage
Sibling relationship
What is the probability of a child inheriting a dominant genetic disorder if one parent is affected?
25%
75%
10%
50%
In a pedigree, what does a circle represent?
female
deceased
unknown gender
male
What is the probability of a child inheriting a recessive genetic disorder if one parent is affected?
25%
75%
10%
50%
In a pedigree, what does a square represent?
male individual
deceased individual
unknown gender individual
female individual
What is the probability of a child inheriting a dominant genetic disorder if both parents are carriers?
25%
75%
50%
100%
The trait shown in the above pedigree is:
dominant
recessive
The trait shown in the above pedigree is:
dominant
recessive
Cystic fibrosis is a recessive trait. What must be the genotypes of Carla's parents?
CC and cc
Cc and Cc
Cc and cc
CC and CC
What is the correct genotype for individual I-2?
What is the mode of inheritance of the trait being studied in the pedigree?
Dominant
Recessive
Match the following terms to their definitions:
Allele
The different possible versions of a gene
Dominant allele
B, T, or E
Recessive allele
b, t, or e
Phenotype
The physical appearance that is created by genes
Genotype
The two alleles or copies of DNA that you inherit from your parents
Do you think the trait being recorded in this family is dominant or recessive?
Dominant
Recessive
The colored shapes always denote the diseased individuals. What type of disease is shown in the pedigree?
the disease is recessive
the disease is dominant
If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?
HH
Hh
hh
The colored shapes always denote the diseased individuals. What type of disease is shown in the pedigree?
the disease is recessive
the disease is dominant
The pedigree diagram shows the family members with a genetic disease. Which statement is true
this disease only affects males
this disease is dominant
this disease only affects females
this disease is contagious
If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?
HH
Hh
hh
This family tree shows the people with a recessive disorder colored in. How many females have the disorder?
1
2
3
4
6
Use the key to work out how many family members have the recessive disease Hemophilia?
4
7
All
None
How many generations are there?
1
2
3
4
What is the genotype of person 6
Definitely Bb
Definitely BB
Definitely bb
Either Bb or BB
Either Bb or bb
What is the relationship between person 3 and person 7?
parent & child
grandparent & grandchild
brother & sister
uncle & niece
husband & wife
This pedigree diagram shows eye colour. What is the genotype of person 1?
Definitely Bb
Definitely BB
Definitely bb
Either Bb or BB
Either Bb or bb
This pedigree diagram shows eye colour. What is the genotype of person 8?
Definitely Bb
Definitely BB
Definitely bb
Either Bb or BB
Either Bb or bb
This pedigree diagram shows eye colour. What is the genotype of person 4?
Definitely Bb
Definitely BB
Definitely bb
Either Bb or BB
Either Bb or bb
Use the key to work out how many family members have the recessive disease Hemophilia?
4
7
All
None
