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Science: Cell Divison Part 3
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Occurs when chromosomes fail to separate during meiosis
Nondisjunction
What can happen during nondisjunction?
(2)
Chromosomal Abnormality
Mutation
What can nondisjunction affect?
Body Chromosomes as well as as sex chromosomes
Occur when part of a chromosome breaks off
Deletion
Occur when a part of a chromosome inverts
Inversion
Occurs when a part of a chromosome doubles
Duplication
Occurs when parts of chromosomes move to other chromosomes
Translocation
What does not separate properly during Meiosis?
Translocation
Medical procedure used in prenatal diagnosis of chromosomal abonormalities
Amniocentesis
A small amount of amniotic fluid, which contains fetal tissues, samples and is used to create a karyotype
Amniocentesis
The number and appearance of chromosomes in a eukaryotic cell
Karyotype
Most common chromosome disorder, 1/700 affected
Downs Syndrome
What is Downs Syndrome called?
Trisomy 21
Downs Syndrome:
Life Span?
Shorter Life span than normal
Females lacking an X chromosome
Turners Syndrome XO
What are the side effects of Turners Syndrome XO?
(5)
Short stature
Webbed Neck
Poor Developed sex organs
underdeveloped breasts
low intelligence
Males with an extra X chromosome
Klinefelters Syndrome XXY
Side effects of Klinefelters Syndrome XXY?
(4)
Underdeveloped sex organs
Breasts
Woman's body
Low Intelligence
Cri du Chat Syndrome:
Symptoms:
(7)
High-pitched cry
Low birth weight
Slow growth
Small head
Wide-set eyes
Low set ears
Mental Retardation
Edwards Syndrome:
Symptoms:
(6)
Small bodied
Mental Retardation
Clenched fists
Heart malformation
Small face in proportion to head
Average survival time is 2 to 4 months
Deletion of Chromosome 5
Cri du Chat
Non-disjunction of chromosome 18
Edwards syndrome
How to tell which chromosomes match up to what?
(2)
Length and pattern
When chromosomes are in pairs
Diploid
What is the final products of Meiosis?
(3)
4 different haploid sex cells
23 chromosomes
4 sperm
What is the final products of Mitosis?
(3)
2 body cells with the same # of chromosomes
46 chromosomes
1 egg and 3 polar bodies
What causes down syndrome?
The extra 21st chromosome
Author
LaurenCamp29
ID
194277
Card Set
Science: Cell Divison Part 3
Description
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Updated
2013-01-23T22:40:21Z
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