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Wize University Biology Textbook > Mendelian Genetics

Pedigree Practice Problems

Inheritance of X-Linked TraitsPrevious Section
Probability Practice ProblemsNext Section
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Practice: Type of Inheritance

What type of inheritance pattern is shown in the following pedigree (individuals with the phenotype are shown in black)?

Practice: Recessive Pedigree

Which of the following show pedigrees with recessive inheritance patterns? Select all that apply.

Practice: Type of Inheritance

What type of inheritance pattern is shown in the following pedigree (individuals with the phenotype are shown in black)? Select all that apply.


Practice: AD, AR or X?

Identify if pedigree is autosomal dominant, autosomal recessive, or X-linked:


Practice: Two Trait Crosses

In cats, big ears are dominant over short ears, and the gene is autosomal. Another gene controls eye color, and is X-linked. "E" gives brown eyes, "e" gives blue eyes, and Ee gives green eyes.

Brown eyed male with the homozygous genotype for big ears is mated with a female with short ears and green eyes. What are the possible kittens that could be produced?

Note: X-linked traits are on the X chromosome. Females have two X chromosomes while males have one X chromosome and one Y chromosome.



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Practice: AD, AR or X?

Identify if pedigree is autosomal dominant, autosomal recessive, or X-linked:


Practice: Zebrafish Two Trait Crosses

You breed two true-breeding stains of zebrafish, a male zebrafish with short fins and stripped and a female with long fins and spotted. All the females in the F1 generation were long finned and stripped while all the males were long finned and spotted. Body pattern is sex-linked trait. Answer the next 3 questions based on this scenario.

Allele denotation:
  • Fin length: A,a
  • Body pattern: XB,Xb
What is the genotypes of the parent strains? (Order alleles with Fin length then body pattern e.g. AaXBY)

Practice: Type of Inheritance

Consider the following pedigree (black / white represents carriers):
This is a 3 part question.



What type of inheritance is the disease shown in this pedigree undertaking?

Extra Practice
Practice: Type of Inheritance
Consider the following pedigree (black / white represents carriers):
This is a 3 part question.
Practice: Zebrafish Two Trait Crosses
You breed two true-breeding stains of zebrafish, a male zebrafish with short fins and striped and a female with long fins and spotted. All the females in the F1 generation were long finned and striped while all the males were long finned and spotted. Body pattern is sex-linked trait. Answer the next 3 questions based on this scenario.
Allele denotation:
Practice: Two Trait Crosses
In cats, big ears are dominant over short ears, and the gene is autosomal. Another gene controls eye color, and is X-linked. "E" gives brown eyes, "e" gives blue eyes, and Ee gives green eyes.
Brown eyed male with the homozygous genotype for big ears is mated with a female with short ears and green eyes. What are the possible kittens that could be produced?
Practice: Type of Inheritance
Consider the following pedigree (black / white represents carriers):
This is a 3 part question.
Practice: Zebrafish Two Trait Crosses
You breed two true-breeding stains of zebrafish, a male zebrafish with short fins and stripped and a female with long fins and spotted. All the females in the F1 generation were long finned and stripped while all the males were long finned and spotted. Body pattern is sex-linked trait. Answer the next 3 questions based on this scenario.
Allele denotation:
Practice: Two Trait Crosses
In cats, big ears are dominant over short ears, and the gene is autosomal. Another gene controls eye color, and is X-linked. "E" gives brown eyes, "e" gives blue eyes, and Ee gives green eyes.
Brown eyed male with the homozygous genotype for big ears is mated with a female with short ears and green eyes. What are the possible kittens that could be produced?
Practice: Type of Inheritance
What type of inheritance pattern is shown in the following pedigree (individuals with the phenotype are shown in black)? Select all that apply.
Practice: Recessive Pedigree
Which of the following show pedigrees with recessive inheritance patterns? Select all that apply.
Practice: Type of Inheritance
What type of inheritance pattern is shown in the following pedigree (individuals with the phenotype are shown in black)?
Practice: AD, AR or X?
Identify if pedigree is autosomal dominant, autosomal recessive, or X-linked: