Chromosomes were first observed in plant cells by Swiss botanist Karl Wilhelm von N?geli in 1842, and independently in Ascaris worms by Belgian scientist Edouard Van Beneden (1846-1910). The use of basophilic aniline dyes was a fundamentally new technique for effectively staining the chromatin material in the nucleus. Their behavior in animal (salamander) cells was later described in detail by German anatomist Walther Flemming, the discoverer of mitosis, in 1882. The name was invented later by another German anatomist, Heinrich von Waldeyer
No one invented chromosomes, they were discovered
Morgan
It depends on what the animal or plant is. For humans, the first division results in 23 chromosomes per cell
Chromosomes are found only in the nucleus of the cell. Although they are actually observed as chromatinthroughout most of the cell's life the chromatin does condense into chromosomes during mitosis/meiosis.
sex chromosomes were first discovered in what organism
Chromosomal disorders can be observed in a human karyotype. It can show whether there are extra chromosomes, or missing chromosomes, or malformed chromosomes, or whether chromosomes have extra pieces, or missing pieces.
double chromosomes first become visible in which step of mitosis?
It depends on what the animal or plant is. For humans, the first division results in 23 chromosomes per cell
Yes. During prophase the chromosomes condense to prepare for cell division.
Because those are the shapes of the individual chromosomes observed under an optical microscope.
The number of chromosomes depends on which species of animal was used in your modle.
Chromosomes are found only in the nucleus of the cell. Although they are actually observed as chromatinthroughout most of the cell's life the chromatin does condense into chromosomes during mitosis/meiosis.
he observed that grasshopper body cells and sex cells have the same number of chromosomes
when education month was first observed
sex chromosomes were first discovered in what organism
First cell observed was a cork cell.So it was the first plant cell observed.
A karyotype is basically a chart of the number and structure of chromosomes. They can reveal ploidy differences (missing or additional chromosomes such as trisomy 21) or chromosomal mutations (like inversions, deletions, translocations etc)
Chromosomal disorders can be observed in a human karyotype. It can show whether there are extra chromosomes, or missing chromosomes, or malformed chromosomes, or whether chromosomes have extra pieces, or missing pieces.
Chromosomes that are not X or Y are called homologous chromosomes and autosomal chromosomes. The first 22 pairs of human chromosomes are autosomal.