autosomal and sex chromosome abnormalities
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Autosomal and Sex chromosome abnormalities. Sex chromosome anomalies. Sex Chromosome Abnormalities. Sex chromosomes abnormalities. KLINEFLETER SYNDROME A male with XXY chromosomes Exhibits some female characteristics Such as enlarged breasts and high pitched voice. TURNERS SYNDROME

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sex chromosome anomalies
Sex chromosome anomalies

Sex Chromosome Abnormalities

sex chromosomes abnormalities
Sex chromosomes abnormalities


A male with XXY chromosomes

Exhibits some female characteristics

Such as enlarged breasts and

high pitched voice


A female with XO exhibits a short stature, short neck, and broad chest with immature sex organs

  • If in meiosis II the Y chromosome does not separate and is passed on to a boy the sex chromosomes will be XYY. Boys with this are unusually tall but have normal fertility. Studies have also shown that these men tend to be more violent than a XY male.
how does it happen
How does it happen?

Non-disjunction can result in

abnormalities in the number of

sex chromosome. Both Klinefelter

and Turners result from nondisjunction

of either the male or female gamete.

The disjunction of the female gametes

can result in a Triple X female

down syndrome
Down Syndrome
  • Down syndrome is a chromosomal abnormality of the 21th chromosome. It is known as Trisomy 21 since nondisjunction of a faulty cell division results in an embryo with three number 21 chromosomes instead of  two. People with down syndrome are usually mentally retarded, shorter, have a larger head and a short life span (usually about 30 years).
Down syndrome- Prior to, or at, conception, a pair of number 21 chromosomes, in either the sperm or the egg, fail to separate

Karyotype of down syndrome