Non-Mendelian Inheritance

Question 1

The pedigree on the right shows the inheritance pattern for an X-linked recessive disorder.How many individuals are carriers of the disease but are not affected?

Revolt · Accepted Answer

4

Question 2

Why are women often carriers of X-linked traits but rarely affected by them?

Revolt · Accepted Answer

Women have two X chromosomes. Recessive alleles on one X chromosome are often masked by dominant alleles on the other chromosome. Women will not be affected unless they receive two recessive alleles.

Question 3

The pedigree on the right shows the inheritance pattern for an X-linked recessive disorder.The mother of the individuals circled in pink is not shown on the pedigree. Based on the phenotypes of these individuals and their father, what are the possible genotypes of their mother? Check all of the boxes that apply.

Revolt · Accepted Answer

A: XAXA; C: XAXa

Question 4

The pedigree on the right shows the inheritance pattern for an X-linked recessive disorder.If the female circled in pink married an affected male and had a female child, what is the chance that the child would also be affected? Express your answer in a percentage.%What is the chance that the child would be a carrier? ⇒ 50% True or false? The child could be standard.

Revolt · Accepted Answer

Part 1: 50

Question 5

What is the genotype of the male circled in pink?

Revolt · Accepted Answer

A: XaY

Question 6

Which of the following did you include in your response? Check all of the boxes that apply.

Revolt · Accepted Answer

A: Women have two X chromosomes.; B: Recessive alleles on one X chromosome are often masked by dominant alleles on the other chromosome.; C: Women will not be affected unless they receive two recessive alleles.

Question 7

True or false? The child could be standard.

Revolt · Accepted Answer

B: false

Non-Mendelian Inheritance Answers

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