Course: NURS 3421 Basic Life Science
Instructor: Nancy Taggart Davis, Ph.D.
Prerequisite: Anatomy, Physiology, Chemistry

Pedigree Charting Practice Questions

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1. What is fragile X syndrome? Is it related to the autosome or sex chromosomes?

2, What is recombinant DNA technology? Know a little bit about how it works.


3. Answer the following questions from the information available in the two pedigree charts below assume that it is an autosomal recessive disease like PKU. (assume that 6 is not a carrier)

Family 1:
 Family 2:

The genotype of individual 10 is:
a) AA
b) Aa
c) Unknown

The genotype of individual 11 is:


a) AA
b) Aa
c) AA or Aa


d) Aa or aa

If #6 and #2 produce a child, the probability that it will be phenotypically normal is:
0) 0
b) 1/2
c) 2/3
d) 1/6
a) 3/4

If #4 and #10 produce a child the probability that it will be phenotypically normal is:
a) 0
b) 1/2
c) 2/3
d) 100%
a) 3/4

A woman with Marfan's marries a man without Marfan's. What percentage of their children will probably have this condition? There are two correct answers. Which Is most likely. Assume that marfan's is fully penetrant

Look at the following pedigree chart and answer the questions A) true or B) false

 

The trait above is most likely autosomal recessive.

The above trait is definitely autosornal recessive.


The trait above could be sex-linked recessive


The above could be a new mutation for an autosomal dominate trait.

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