Sage-Tips

What is meant by idiogram?

(ˈkærɪəʊˌɡræm ) noun. a diagram or photograph of the chromosomes of a cell, arranged in homologous pairs and in a numbered sequence. Also called: idiogram.

What is idiogram in zoology?

An idiogram is a diagram where chromosomes of the haploid set of an organism are ordered in a series of decreasing size.

What is ideogram in biology?

An ideogram is a diagrammatic representation of the karyotype that shows all of the pairs of homologous chromosomes in the nucleus. The pairs of chromosomes are lined up in order of size, so that the centromeres are aligned and the short arm is uppermost.

What is an ideogram and its significance?

An ideogram is a graphic picture or symbol (such as @ or \%) that represents a thing or an idea without expressing the sounds that form its name. Also called ideograph. The use of ideograms is called ideography. Ideograms are used in some writing systems, such as Chinese and Japanese.

What is the difference between karyotype and Idiogram?

The key difference between karyotype and idiogram is that karyotype is the actual picture of total chromosomes of a cell while idiogram is a schematic diagram of a karyotype that illustrates all chromosome maps. Karyotyping is a technique performed to examine the complete set of chromosomes in a cell.

What is a polytene chromosome?

Polytene chromosomes develop from the chromosomes of diploid nuclei by successive duplication of each chromosomal element (chromatid) without their segregation. The newly formed chromatids remain associated lengthwise and together form a cable-like structure, referred to as polytene chromosomes.

What is idiogram and Karyograph?

A karyotype is the set of chromosomes contained in the nucleus of a species. It discloses the size, number, shape and type of chromosome. The diagrammatic representation of karyotype is called the idiogram. While preparing an idiogram, the homologous pair of chromosomes are arranged in the order of decreasing lengths.

What is difference between Karyogram and idiogram?

A karyotype is the actual picture of the chromosome set of a cell arranged in homologous pairs and in a series of decreasing size while idiogram is the diagrammatic representation of the karyotype of an individual. So, this is the key difference between karyotype and ideogram.

What is an example of an ideogram?

Ideograms are graphical symbols that represent an idea or concept. Good examples of ideogram are the red circle that means “not allowed”, or the orange or yellow triangle that means “attention” or “danger”. For example, the icon that represents the meaning of the idea is represented by a light bulb.

What is difference between euchromatin and heterochromatin?

Euchromatin has a less compact structure, whereas heterochromatin is more compact and composed of an array of nucleosomes condensed into a fiber. These regions, which are known as constitutive heterochromatin, remain condensed throughout the cell cycle and are not actively transcribed.

Do humans have polytene chromosomes?

While polytene chromosomes are most frequently found in insects, they are critical in diverse organisms from ciliates to plants to humans, and they play important roles in disease progression.