What is the chromosomes and what is metosis?
What is the chromosomes and what is metosis?
CHROMOSOMES:-In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.
Each chromosome has a constriction point called the centromere, which divides the chromosome into two sections, or “arms.” The short arm of the chromosome is labeled the “p arm.” The long arm of the chromosome is labeled the “q arm.” The location of the centromere on each chromosome gives the chromosome its characteristic shape, and can be used to help describe the location of specific genes. MITOSIS:-Mitosis is a process where a single cell divides into two identical daughter cells (cell division).
• During mitosis one divides once to form twoidentical cells.
• The major purpose of mitosis is for growth and to replace worn out cells.
• If not corrected in time, mistakes made during mitosis can result in changes in thethat can potentially lead to . MEOSIS: -Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells – sperm in males, eggs in females.
- During meiosis one cell? divides twice to form four daughter cells.
- These four daughter cells only have half the number of chromosomes? of the parent cell – they are haploid.
- Meiosis produces our sex cells orgametes? (eggs in females and sperm in males).
CHROMOSOMES:-In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.
Each chromosome has a constriction point called the centromere, which divides the chromosome into two sections, or “arms.” The short arm of the chromosome is labeled the “p arm.” The long arm of the chromosome is labeled the “q arm.” The location of the centromere on each chromosome gives the chromosome its characteristic shape, and can be used to help describe the location of specific genes. MITOSIS:-Mitosis is a process where a single cell divides into two identical daughter cells (cell division).
| • | During mitosis one divides once to form twoidentical cells. |
| • | The major purpose of mitosis is for growth and to replace worn out cells. |
| • | If not corrected in time, mistakes made during mitosis can result in changes in thethat can potentially lead to . MEOSIS: -Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells – sperm in males, eggs in females.
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