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caused by
include include include
Autosomol Disorders
Recessive alleles
Dominant alleles
Codominant alleles
Albinism Galactosemia Tay-Sachs disease
Huntington’s disease
Sickle cell disease
Cystic fibrosis
Phenylketonuria Achondroplasia Hypercholes- terolemia
A circle represents a female.
A square represents a male.
A horizontal line connecting a male and female represents a marriage.
A vertical line and a bracket connect the parents to their children. A half-shaded
circle or square indicates that a person is a carrier of the trait. A completely
shaded circle or square indicates that a person expresses the trait.
A circle or square that is not shaded indicates that a person neither expresses the trait nor is a carrier of the trait.
Phenotype (Blood Type) Genotype
Antigen on Red Blood Cell
Safe Transfusions To From
1. What is a pedigree? 2. In a pedigree, females are
represented by what? Males? 3. In a pedigree, how is a carrier
represented? 4. What are the four blood types? 5. List the blood types in order from
most common to least common.
X
X X
X
X X X
Y
Y
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Homologous chromosomes fail to separate
Meiosis I: Nondisjunction
Meiosis II
Father (normal vision)
Colorblind Normal vision
Mother (carrier)
Daughter (normal vision)
Son (normal vision)
Daughter (carrier)
Son (colorblind)
Male
Female
http://colorvisiontesting.com/ishihara.htm
1. What is nondisjunction? What does it cause?
2. What is a sex-linked trait? Give an example.
3. How are sex-linked traits passed on?
4. Explain crossing over.
A duplication occurs when part of a chromosome is copied (duplicated) abnormally, resulting in extra genetic material from the duplicated segment
Translocation is a chromosomal disorder in which a fragment of a CHROMOSOME breaks from its original chromosome and attaches itself to a different chromosome.
A deletion occurs when a chromosome breaks and some genetic material is lost.
In this example, one nucleotide (adenine) is added in the DNA code, changing the amino acid sequence that follows
Inversions occur when a chromosome breaks in two places and the resulting piece of DNA is reversed and re-inserted into the chromosome.
1. What is duplication? 2. What is translocation? 3. What is a deletion? 4. What is an insertion? 5. What is an inversion?
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