Download p. 85 Genetic Disorders

p. 85
Genetic Disorders
How many chromosomes do you see in this karyotype?
p.
Genetic Disorders
(text p. 150)
Genetic Disorder: an abnormal condition that a person
inherits through genes or chromosomes.
Some are caused by mutations in the DNA of genes
Some by the structure or number of chromosomes
* Karyotype: a picture of all the chromosomes in a cell
* Genetic Counseling: counselors that use tools such as
karyotypes, pedigree charts and punnett squares to
give advice on chances of passing on disorders
Human Genetic Disorders JIGSAW
Become an expert of your disorder!
You are going to teach your lab table about it. ☺
You have 8 minutes. Everyone must present.
On page 85, describe your disorder:
The disorder
What causes the disorder?
How is it inherited?
Other interesting fact (s).
Cystic Fibrosis
Sickle Cell Disease
Hemophilia
Down Syndrome
On page 85, describe your disorder:
The disorder
What causes the disorder?
How is it inherited?
Other interesting fact (s).
Human Genetic Disorders
Types of Genetic Disorders:
1)
Cystic Fibrosis: a genetic disorder where the body
produces abnormally thick mucus in the lungs and
intestines
-caused by a recessive allele with mutations
2) Sickle Cell Disease: affects hemoglobin so the sickle
red blood cells cannot carry as much oxygen as normal
cells
-caused by having two sickle cell co-dominant alleles
Human Genetic Disorders
Types of Genetic Disorders:
3) Hemophilia: a genetic disorder in which a person’s
blood clots very slowly or not at all
-caused by a recessive allele on the X chromosome, more
common in males
4) Down Syndrome: a person’s cells have an extra copy of
chromosome 21 (three chromosomes instead of two)
-caused during meiosis when chromosomes fail to separate
correctly
Human Genetic Disorders
Pedigree: a chart or family tree that tracks which
members of a family have a particular trait
Managing Genetic Disorders:
*Medical Treatment is available: physical therapy,
medicine, education and job training
Review Questions
Identify two major causes of genetic disorders in
humans.
Which one is responsible for Down syndrome?
What is a pedigree?
What is a karyotype?
What is the purpose of a genetic counselor?
Explain one genetic disorder and the cause of it.
Complete a 4 sentence summary & 4 study questions.
Complete worksheet p. 73 Modern Genetics.
Video Field Trip Genetics: The Science of Heredity
Genetics Review--Extra
On Page in your notebook:
Define the following terms:
Genetics
•Hybrid
•Heredity
Probability
•Dominant Allele
Alleles
•Recessive Allele
Trait
•Heterozygous
Genotype
•Homozygous
Phenotype
•Punnett Square
Purebreed
Draw a picture or give an example to help you
remember each term.