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1) What are the X- inheritance diseases ?

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2)  How does identify the chromosome abnormalities?
A chromosome abnormality, disorder, anomaly, aberration is  irregular portion of chromosomal DNA.

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1.Traits are much more frequent  in females than males.
It is the vertical transmission pattern.
Affected males cannot transmitted disease to son but it can transmitted the disease to 100% daughters.
2.we can identify the chromosome abnormalities in deletion,duplication ,inversion and translocation .
4.The syndrome XO affects only the females.
The turner syndrome is also called as 45,XO.

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3. In severe cases they have relatively high-pitched voices asexual to feminine body contours as well as breast enlargement and comparatively. 2.chromosomes can be identified by their number size centromere positionand banding pattern. In a human karyotype autosomes or body chromosomes.
1  X-linked inheritance means that the gene causing the trait or the disorder is located on the X chromosome.

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1.   Hemophilia A is an X-linkedrecessive disease caused by a lack of a coagulant, or blood clotting agent, called factor VIII (factor 8). This is caused by a mutation in a gene on the Xchromosome called F8. (eg: Hemophilia A)

2.   When an individual is missing one of the chromosomes from a pair, the condition is called monosomy.

3. A genetic condition in which a male is born with an extra copy of the X chromosome.

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1.  X-linked dominant inheritance indicates that a gene responsible for a genetic  disorder is located on the X chromosome and only one copy of allele is sufficient to cause disorder when inherited from a parent who ha the disorder.
example disorder:
1)Red-Green colour blindness
2)Hemophilia A
3)Hemophilia B
4)Duchenne muscular dystrophy
5)Becker's muscular dystrophy

2

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Hari Sankar                         3) What is  XXY?            The XXY  is the set of symptoms that result from two or more X chromosomes in males are femail

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Hari Sankar                         3) What is  XXY?            The XXY  is the set of symptoms that result from two or more X chromosomes in males are femail

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1. There are a lot of common diseases caused while X-inheritance. Some are:
i) Down syndrome
ii) Cystic fibrosis
iii) Huntington's disease
iv) Duchenne muscular                          dystrophy
v) Sickle cell anaemia
vi) Haemophilia
vii) Thalaesemia

2. Chromosome is a thread like structure present in the central nucleus of any living cell. The sympoms to identify the chromosomal disorders is :
i) Bleeding of fluid from the vagina is abmormal.
ii) The baby affected by this will suffering from down syndromes, and other syndromes.

3.  Triple X syndrome, also called trisomy X or 47,XXX, is characterized by the presence of an additional X chromosome in each of a female's cells. Although females with this condition may be taller than average, this chromosomal change typically causes no unusual physical features

4.     Turner syndrome or XO syndrome affects only females.
In this condition the females contains only one copy of X chromosome instead of two copies.

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2. How does identify the chromosome abnormalities?
3.What is  XXY?
4. What is XO?