What are individual chromosomes made of?

Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). Passed from parents to offspring, DNA contains the specific instructions that make each type of living creature unique. The term chromosome comes from the Greek words for color (chroma) and body (soma).

What are the individual chromosomes?

Chromosomes, composed of protein and DNA, are distinct dense bodies found in the nucleus of cells. Genetic information is contained in the DNA of chromosomes in the form of linear sequences of bases (A,T,C,G). The DNA in an individual chromosome is one, long molecule which is highly coiled and condensed.

How are individual chromosomes identified?

In a given species, chromosomes can be identified by their number, size, centromere position, and banding pattern. In a human karyotype, autosomes or “body chromosomes” (all of the non–sex chromosomes) are generally organized in approximate order of size from largest (chromosome 1) to smallest (chromosome 22).

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Where are chromosomes located what are they composed of?

Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). Passed from parents to offspring, DNA contains the specific instructions that make each type of living creature unique.

What are genes made of?

Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases.

What is made by staining and arranging chromosomes so that they can be viewed microscopically?

Karyotyping is the process of pairing and ordering all the chromosomes of an organism, thus providing a genome-wide snapshot of an individual’s chromosomes. Karyotypes are prepared using standardized staining procedures that reveal characteristic structural features for each chromosome.

How are chromosomes packaged inside the cell?

Chromosomal DNA is packaged inside microscopic nuclei with the help of histones. These are positively-charged proteins that strongly adhere to negatively-charged DNA and form complexes called nucleosomes. Each nuclesome is composed of DNA wound 1.65 times around eight histone proteins.

How are karyotypes made?

A karyotype is simply a picture of a person’s chromosomes. In order to get this picture, the chromosomes are isolated, stained, and examined under the microscope. Most often, this is done using the chromosomes in the white blood cells. A picture of the chromosomes is taken through the microscope.

What are chromosomes located what are they composed of what is chromatin material and how does it change just before the cell divides?

chromosomes are located in the nucleus. they are composed of chromatin which is made up of DNA . chromatin is a material made up of DNA which is genetic material . … Just before division, the chromatin takes form of thread like structure which is chromosomes.

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Where are chromosomes located what are they composed of what is chromatin material and how does it change just before the cell divides Class 9?

Answer Expert Verified

Chromosomes are located inside the nucleus of plants and animals cells. Chromosomes are composed of single DNA(Deoxyribo Nucleic Acid) molecule and proteins. Chromatin material is thread like strucure that condenses to form x shaped chromosomes during cell division.

What are chromosomes composed of how is chromatin material related to chromosomes?

Chromatin is the material that makes up a chromosome that consists of DNA and protein. The major proteins in chromatin are proteins called histones. They act as packaging elements for the DNA. The reason that chromatin is important is that it’s a pretty good packing trick to get all the DNA inside a cell.

Are chromosomes made up of genes?

Chromosomes are structures within cells that contain a person’s genes. Genes are contained in chromosomes, which are in the cell nucleus. A chromosome contains hundreds to thousands of genes. Every normal human cell contains 23 pairs of chromosomes, for a total of 46 chromosomes.

What is a DNA strand made of?

The DNA molecule consists of two strands that wind around one another to form a shape known as a double helix. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases–adenine (A), cytosine (C), guanine (G), and thymine (T).

What is gene What is its chemical composition and function?

A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, act as instructions to make molecules called proteins.Genes are composed of deoxyribonucleic acid (DNA), except in some viruses, which have genes consisting of a closely related compound called ribonucleic acid (RNA).

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