Turners syndrome is a
result of which of the
following nondisjunction
mutations?
A. only an X chromosome this is answer
B. three copies of the 21st chromosome
C. two X chromosomes and a Y
D. deletion of chromosome 5
This disorder is caused due to the fusion if an normal sperm with an abnormal egg or of a abnormal sperm with a normal egg, both of which results in 22+X0 condition.
The females have rudimentary ovaries and hence are sterile and also lack secondary sexual characters.
Some other chromosomal disorders are:-
Down's syndrome - Caused due to trisomy of 21stchromosome .
Klinefelter's syndrome- Due to presence of additional copy of a X chromosome.
