Download Genetic Deaths Among Droids

Genetic Deaths
Among Droids
Angela Maxwell
ITEC 67432
May 2017
Objectives
Understand the impact of
Bectra on the Droid
population.
Create pedigree charts for
male and female Droids.
Predict probabilities of death
for Droid offspring.
1.
The Problem
About Bectra
“
Bectra is a fatal genetic
disease impacting Droids. It is
caused by a recessive gene.
Individuals who inherit Bectra
die in the larva stage.
2.
The Counselor’s
Role
What do I do?
The Job of the Genetic Counselor
◎Assess Droids to determine their
offspring’s risk for inherited conditions.
◎Provide information and support to
Droid families and healthcare
professionals.
3.
Droid
Reproduction
Litters and Probability
Litters
◎One gene is passed from each parent.
DROID GENE INHERITANCE
Father
50%
Mother
50%
Probability
◎Droids have six offspring per Litter.
OFFSPRING IN EACH DROID LITTER
Female
50%
Male
50%
Reproductio
n Review
Choose the phrase that best completes the sentence.
Droid parents each pass on _____ to
their offspring and there are ____
offspring in a litter.
◎ One gene; six
◎ Two genes; three
4.
Genes
Chromosomes and Inheritance
Chromosomes
◎Genes are carried on chromosomes.
Genes
◎ Genes are Dominant (B) or Recessive
(b)
B b
B
b
Inheritance
◎Watch how each parent contributes one
gene to its offspring so that traits are
determined by pairs of genes.
Genes
◎ Offspring must inherit a recessive from
each parent for the recessive trait to
show up in the offspring.
B b
B
b
5.
Notations
How to mark genes
Pedigree Chart
Parent
male
female
Offspring
decea
sed
decea
sed
Notations
◎Dominant genes are designated by a
capital letter B.
B
Notations
◎Recessive genes are designated by a
lowercase letter b.
b
b
Gene
Review
Choose the diagram that best explains
inheritance.
B
B
b
b
BB
Bb
bB
bb
B
b
B
b
BB
BB
bb
bb
“
Droid larvae have a 25%
chance of inheriting Bectra.
6.
Review
practice
Use the Diagram to Answer the Question
The most likely genetic structure of individual 4 is:
◎BB
◎bb
Use the Diagram to Answer the Question
The most likely genetic structure of the father of
individual 6 is:
◎Bb
◎bb
Use the Diagram to Answer the Question
If individuals 6 and 7 are paired, what is the
probability of death of each offspring
◎50%
◎25%
Correct
Back to
Review
Incorrect
Back to
Review
References
◎ Bureau of Labor Statistics.
https://www.bls.gov/ooh/healthcare/gene
tic-counselors.htm
◎Gene Inheritance. Khan Academy.
https://youtu.be/NR3779ef9yQ?t=3m17s
Credits
◎ Presentation template by SlidesCarnival, adapted
by Angela Maxwell
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