homologous variation - définition. Qu'est-ce que homologous variation
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Qu'est-ce (qui) est homologous variation - définition

SET OF ONE MATERNAL AND ONE PATERNAL CHROMOSOME THAT PAIR UP WITH EACH OTHER INSIDE A CELL DURING MEIOSIS. HOMOLOGS HAVE THE SAME GENES IN THE SAME LOCI
Homologous Chromosomes; Homologous chromosomes; Homologs
  •  During the process of meiosis, homologous chromosomes can recombine and produce new combinations of genes in the daughter cells.
  • Diagram of the general process for double-stranded break repair as well as synthesis-dependent strand annealing.
  • Karyotype}}
  •  Sorting of homologous chromosomes during meiosis.
  • 1. Meiosis I 2. Meiosis II 3. Fertilization 4. Zygote
Nondisjunction is when chromosomes fail to separate normally resulting in a gain or loss of chromosomes. In the left image the blue arrow indicates nondisjunction taking place during meiosis II. In the right image the green arrow is indicating nondisjunction taking place during meiosis I.

variation         
WIKIMEDIA DISAMBIGUATION PAGE
Variations; Varied; Varying; Variation (disambiguation); Viccitude; Variations (album); Variation (combinatorics); Variations (Combinatorics); Variation (Combinatorics)
¦ noun
1. a change or slight difference in condition, amount, or level.
(also magnetic variation) the angular difference between true north and magnetic north at a particular place.
2. a different or distinct form or version.
Music a new but still recognizable version of a theme.
Ballet a solo dance as part of a performance.
Derivatives
variational adjective
varied         
WIKIMEDIA DISAMBIGUATION PAGE
Variations; Varied; Varying; Variation (disambiguation); Viccitude; Variations (album); Variation (combinatorics); Variations (Combinatorics); Variation (Combinatorics)
¦ adjective incorporating a number of different types or elements; showing variation or variety.
Derivatives
variedly adverb
variation         
WIKIMEDIA DISAMBIGUATION PAGE
Variations; Varied; Varying; Variation (disambiguation); Viccitude; Variations (album); Variation (combinatorics); Variations (Combinatorics); Variation (Combinatorics)
(variations)
1.
A variation on something is the same thing presented in a slightly different form.
This delicious variation on an omelette is quick and easy to prepare...
N-COUNT: usu N on n
2.
A variation is a change or slight difference in a level, amount, or quantity.
The survey found a wide variation in the prices charged for canteen food...
Every day without variation my grandfather ate a plate of cold ham.
N-VAR

Wikipédia

Homologous chromosome

A couple of homologous chromosomes, or homologs, are a set of one maternal and one paternal chromosome that pair up with each other inside a cell during fertilization. Homologs have the same genes in the same loci where they provide points along each chromosome which enable a pair of chromosomes to align correctly with each other before separating during meiosis. This is the basis for Mendelian inheritance which characterizes inheritance patterns of genetic material from an organism to its offspring parent developmental cell at the given time and area.