Transcript Minority/Majority Identity Development Theory

Biology and Sex
Chromosomal Sex
Chromosomal Anomalies
KEY CONCEPTS
• Chromosomal Sex
• The Basics: 46 Chromosomes, Two Sex Chromosomes, X’s And Y’s
• Andosperm and Gynosperm
• The Problematic X Chromosome and Sex-Linked Traits
• Chromosomal Anomalies
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Errors in cell division lead to extra or missing chromosomes
Turner’s Syndrome (X Ø)
Trisomy X Syndrome (XXX)
Klinefelter’s Syndrome (XXY or even XXXY)
Supernumerary Y Syndrome (XYY)
Ovum
Sperm
Each contributes 23 chromosomes for a total of 46
Always an X
An X or a Y
X Chromosome
Y Chromosome
XX - Female
XY - Male
Ovum
Sperm
Y-Andosperm
X-Gynosperm
Each contributes 23 chromosomes for a total of 46
Always an X
An X or a Y
XX - Female
XY - Male
THE PROBLEMATIC X CHROMOSOME
Pathological Sex-Linked Traits
Hemophilia • Color Blindness • Muscular Dystrophy
KEY CONCEPTS
• Chromosomal Sex
• The Basics: 46 Chromosomes, Two Sex Chromosomes, X’s And Y’s
• Andosperm and Gynosperm
• The Problematic X Chromosome and Sex-Linked Traits
• Chromosomal Abnormalities
•
•
•
•
•
Errors in cell division lead to extra or missing chromosomes
Turner’s Syndrome (X Ø)
Trisomy X Syndrome (XXX)
Klinefelter’s Syndrome (XXY or even XXXY)
Supernumerary Y Syndrome (XYY)
XX - Female
XY - Male
Turner’s
Syndrome
Trisomy X
Syndrome
In the absence of a “Y” chromosome, these are females.
Klinefelter’s
Syndrome
Supernumerary Y
Syndrome
In the presence of a “Y” chromosome, these are males.
They are “Pseudo-hermaphrodites”