Turner's syndrome occurs due to the lack of x chromosomein female.

Turner's syndrome is a chromosomal disorder occurredin female due to the decrease of sex chrosomes.
Its major symptoms are:
-Swelling of hands & feet of newborn baby.
-Broad chest.
-Low-set ears.
-Obesity.
-Poorly developed ovaries.

Kilenfelter syndrome is a genetic disorder causeddueto the increase in sex chromosome in male
Its major symptoms are:
-Tendency to loose chest hair.
-Poor beard growth.
-Breast development.
-Small tastes.
-Frontal baldness absent.

Down's Syndrome is a genetic disorder caused by thepresence of all or part of an extrachromosomes.
Its major symptoms are:
-Difficultiesin physical activities.
-Slanting eyes and small ears.
-Short sightedness.
-Congenitalheart defects.

A disorder that occurs in the human body due to theincrease or decrease in the number ofchromosomesis called chromosomaldisorder.
Any 3examples are:
-Down's syndrome.
- Klinefelter's syndrome.
-Turner'sSyndrome.

Sex chromosomes are responsible for the determination ofsex in human body. Sex is determinedby the geneticinheritance.Sexchromosomesthat carries genes formalecharacters are Y and female Y. So,

The chromosomes that carry gene for the sexualcharacters called sexchromosomes.
Chromosome of this type is different from autosomesis that autosomes determines various characteristicsof thebody where as sex chromosomes determines sex of anindividual.

Any 3 functions of chromosomes are:
- It acts as ahereditary vehicles.
-It control protein synthesis, cell growth and cell-repair.
-It forms link between parents and their off-springs.

The gametes cell that contains haploid number ofchromosomes is called haploid cell.

The somatic cells that contains the diploid number ofchromosomesis calleddiploidcells. The number of chromosomein the diploid cell of a gorilla, pine and frog are:
Gorilla: 24
Pine:12
Frog:13

Acrocentric chromosomes are the chrosomes in whichthe centromere is located away from the center.
Telecentre chromosomes are the chrosomes in whichthe centromere is located at the end of chromatids.

Metacentric chromosomes are the chrosomes in which the centromere is located at the center dividing the chromatids into two halves.

The two identical stands of a chromosomes is called chromatids.
The constricted part where the chromatids are attached firmly to each other is called centromere.

Chromosome are made of the gentle material DNAand protein.
A gene is the segment of DNA which can form exact copies by the process of replication.
It is locatedin chromosomes.

The literal meaning of chromosomes are:
Chrome: color.
Soma: body.

The different types of chromosomes are:
- Meta centric.
- Sub-metacentric.
- Acrocentric.
- Telocentric.

Chromosomes are located inside the nucleus of a cell.

Chromosomes are the long, thin thread like structurefound inside the nucleusof a cell containing genes insideit.