metacentric chromosomes in humans

The centromere is at the centre and the chromosome is V-shaped during anaphas..

Chromosomes and Centromere - Centromere is the primary constriction in the chromatid of a chromosome where the spindle tubules become attached during cell division. A chromosome generally has only one centromere and such a chromosome is described as monocentr..

.1 to 30 mm in length and 0.2 to 2.0 mm in thickness. When the number is less, the chromosomes are larger in size. A metaphase chromosome shows two identical components called chromatids, joined by a centromere (primary constriction). Each chromatid has two arms. A secondary con..

The exact number of somatic chromosomes in man was not known till 1956. New techniques of staining chromosomes have revealed the exact number and this have greatly helped the study of human genetics. Using the karyotyping techniques the form, shape and size of all the ..

As can be seen from the human karyogram, the chromosomes are classified into two types, autosomes and sex chromosomes. The autosomes have homologous chromosomes as pairs whereas the sex chromosomes are of two different types - X and Y. A female has ..

The techniques of cultivating human cells in specific media and the techniques used in somatic cell genetics have enabled geneticists to understand the biochemical basis of the inheritance of many characters. Division of the human cells in the cell culture is arrested at the met..

uniduchat syndrome: loss of half of the short arm of chromosome 5 in human..

Chromosome number is a species-specific character. The complete set of chromosomes in the body cell of a species is known as karyotype. For example, the 23 pairs of chromosomes found in the somatic cells represent the human karyotyp..

Cell division is a method by which new cells are originated from pre-existing cells. The formation of daughter amoebae in amoeba, the development of sex cells and the growth of a young animal or plant into an adult, all involve cell multiplication. In order to multiply in number, cells undergo cell..

During the formation of gametes, the females will have only one type of gametes, all with one X chromosome. However, the males will produce two types of gametes or sperms, half with X chromosome and half with Y chromosome. Thus the sex of a zygote is determined by whic..