Term: karyotype

Origin: An Greek ??????/karyon(=walnut, kernel)   + ?????/type(=mark, figure, form) > ?????/tipto(=strike, hit) leaving a mark.  à nuclear morphology

Coined : The term karyotype was introduced by Levitsky in  1931  who wrote 'Me personally, used the term karyotype to define the characteristics of the nuclei from one or a group of organisms.' ?. Because of this, the term has taken on its current definition as describing the particular chromosome complement of an individual, as defined by the number and morphology of the chromosomes. (Joris Robert Vermeesch and Anita Rauch, Reply to Hochstenbach et al, European Journal of Human Genetics (2006) 14, 1063?1064. 2006)

A karyotype is the appearance of chromosomes in the nucleus of a eukaryotic cell including number, form and size.

- Chromosomal Aberration
Chromosomal aberration refers to a change in number of chromosomes, can occur on one, or several, or all of the chromosomes within a nucleus. This is cause by the failure of sister chromatids to separate during anaphase of mitosis or the failure of homologous...

- Q: Compare And Contrast The Prokaryotic And Eukaryotic Genomes
The eukaryotic genome is diploid but the prokaryotic genome is haploid. The eukaryotic genome has multiple origins of replication but the prokaryotic genome has only one origin of replication. The eukaryotic genome may have more than one chromosome but...

- Diploid Chromosome Number
Humans have a diploid chromosome number of 46 chromosomes. In other words, there are a total of 46 chromosomes in human cells. The diploid number varies depending on each species. Having a diploid chromosome number means that an organism?s cells contain...

- Sex Determination In Animals
Sex chromosomes and AutosomesMost of the diploid organisms are with separate sexes. The organisms producing sperms are called males and those producing eggs (ova) are called females. Chromosome is the major factor to determine the sex of an organism. The...

- Haploid, Diploid, And Those You Should Avoid
Biological concepts ? ploidy, polyploidy, aneuploidy, cancer, therapy-induced senescence Do your genes or your environment make you who you are. The cop out answer would seem to be that it takes both. But it is definitely true. Certainly, how you are...