Question

Why the chromosomes are in so many different positions, rather than in one distinctive position?

Answer 1

Answer: Chromosomes are the thread like structures, which are made up of DNA ( deoxyribonucleic acid). They are present in different locations rather than in one distinctive location ( like some are present at the nuclear center and some at the periphery). This is due to the density of genes present on them and the size of the chromosome as chromosomes have variable size.

Thus, size of chromosome and the gene density correlates to their different positions rather than one distinctive position.

Answer 2

Chromosomes are in so many different positions, rather than in one distinctive position. Every nucleus contains with genetic material and the entire body is made up cells.Cells undergo equational division.

Further Explanation:

The chromosome is dividing cell.A human cell has 46 chromosomes are present in the nucleus.chromosome contain genetic material.

There are some condition in which one chromosome is missing called monosomy and in the same condition in which one chromosome is extra is called trisomy.

The chromosome is made of DNA and chromatin which is composed of histone protein.Chromosome is different in size and present at different location .we can study this by karyotyping.

The cell cycle refers to an ordered flow of events which includes cell growth as well as cellular division. This cycle produces 2 new daughter cells. The cycle starts with interphase; during which, the cell grows and replicates its own DNA or deoxyribonucleic acid. The interphase begins with:

1. G1 phase: This is the primary growth phase provide nutrient to the cell.

2. S phase or synthesis of DNA: During this phase, the replication of DNA takes place. The centrosome is divide and forms mitotic spindle during the mitosis phase.

3. G2 or second gap: during this phase, the cell mainly replenishes its energy stores as well as synthesizes the proteins which are required for the chromosome manipulation.

The second phase of the cell cycle is the mitosis or M phase. Mitotic phase refers to a multiphase process during which the chromosomes are aligned, segregated, and moved into the 2 new daughter cells which are identical to each other.

This phase starts with:

1. Prophase: During this phase, the condensation of the chromosomes takes place and these chromosomes become visible. Spindle fibers formation take place, breakdown of the nuclear envelope, and nucleolus disappear.

2. Metaphase: During this phase, the formation of spindle fibers is completed and centrosomes are found at the opposite terminals of the cell. The chromosomes line up at the metaphase plate. Each of the sister chromatids is linked to the spindle fiber starting from the opposite poles.

3. Anaphase: During this phase, the cohesion proteins link with the sister chromatids and splits them down. The sister chromatids are pulled towards the opposite terminals of the cell and the non-kinetochore spindle fibers mainly lengthen and elongate the cell.

4. Telophase: During this last phase, the chromosomes arrive at the opposite terminals and start to decondense. Nuclear envelope reappears, and mitotic spindle breaks down. This marks the end of the mitosis.

The end phase of the cell cycle is called cytokinesis wherein the cleavage furrow occurs are segregates the daughter cells. In plant cells, the cell plate is responsible for the segregation of the daughter cells.

Learn more:

1. Learn more about component of DNA brainly.com/question/334927

2. Learn more about base pairing brainly.com/question/2491455

3. Learn more about RNA base pairing brainly.com/question/2416343

Answer Details:

Grade: High School

Subject: Biology

Chapter: Genetic material

Keywords:

Daughter cell,Telophase, cytokinesis, anaphase, mitosis, chromosome, chromatin, Dna, prophase, metaphase.