Question

Condition : . Turner Syndrome (45, XO) in XO individual (compare with typical XX)

1.a) compare what type of external genitals develop in the condition you chose versus typical development of individual with the same genotype (sex chromosomes):

1.b) compare what type of secondary sexual characteristics develop in the condition you chose versus typical development of individual with the same genotype (sex chromosomes):

Answer 1

1. a.) The external genital organs include the mons pubis, labia majora, labia minora, Bartholin glands, and clitoris. The area containing these organs is called the vulva.
Turner syndrome is chromosomal abnormality in which one X chromosome is absent ( 45 XO ) .Normal females have ( 46 XX) genotype .
As Y chromosome is not present so Tetsis doesnt develop
But 2 X chromsome are required for Ovaries it is also no fully developed .
So streak gonads are present in Turner syndrome .
Now external genitalia development is not dependent upon estrogen relaesed from ovary so external genitalia is same and fully developed and as like normal females .

2b) But as Ovarian dysgensesis is there so gonadal failure will occur and then pateint due to lack of estrogen will not be able to develop secondary sexual charcteristics like Breast emalrgement
Poor breast development

Streak ovaries

Underdevelpoed gonads , No mensturation
All this occur because of homrone not produced by Ovaries like estrogen .

Other features of Turner
Low hair line
Wide spaced nipple
Short stature
Shield shaped chest
Shortened metacarpal etc