When does crossing over occur in prophase 1?
singleAnswer
pachytene pachytene stage
Prophase Chromosomal crossover
 When does crossing over occur in prophase 1?
Chromosomal crossover Prophase Chiasma (genetics) Synapsis Homologous chromosome Oogenesis Chromosome segregation Bivalent (genetics) Unequal crossing over Meiosis
Chromosomal crossover, or <b>crossing over</b>, is the exchange of genetic material 
between two homologous chromosomes non-sister chromatids that results in 
recombinant chromosomes during sexual reproduction. It is one of the final 
phases of genetic recombination, which <b>occurs</b> in the pachytene stage of 
<b>prophase</b> I ... Thus in S. cerevisiae proper segregation apparently <b>does</b> not 
entirely depend&nbsp;... <b>Prophase</b> is the first stage of cell division in both <b>mitosis</b> and meiosis. Beginning 
after ... 3.1.<b>1</b> Leptotene; 3.1.2 Zygotene; 3.1.3 Pachytene; 3.1.4 Diplotene; 3.1.5 ... 
In addition to the events that <b>occur</b> in mitotic <b>prophase</b>, several crucial events ... 
phase of <b>prophase</b> I, diplotene (from the Greek for &quot;twofold&quot;), <b>crossing</b>-<b>over</b> is&nbsp;... The chiasmata become visible during the diplotene stage of <b>prophase</b> I of 
meiosis, but the actual &quot;<b>crossing</b>-overs&quot; of genetic material are thought to <b>occur</b> 
during&nbsp;... Synapsis (also called syndesis) is the pairing of two homologous chromosomes 
that <b>occurs</b> during meiosis. It allows matching-up of homologous pairs prior to 
their segregation, and possible chromosomal crossover between them. Synapsis 
takes place during <b>prophase</b> I of meiosis. ... SDSA recombination <b>does</b> not cause 
<b>crossing</b>-<b>over</b>. A couple of homologous chromosomes, or homologs, are a set of one maternal 
and one ... 4.1.<b>1 Prophase</b> I; 4.1.2 Metaphase I; 4.1.3 Anaphase I; 4.1.4 Meiosis II 
... If any <b>crossing over does occur</b> between sister chromatids during <b>mitosis</b>,&nbsp;... Oogenesis, ovogenesis, or oögenesis /ˌoʊ.əˈdʒɛnɪsɪs/ is the differentiation 
of the ovum ... Meiosis begins with DNA replication and meiotic <b>crossing over</b>. ... 
and the secondary oocyte <b>does</b> not complete meiosis II (and doesn&#39;t become an 
ovum). ... In plants, oogenesis <b>occurs</b> inside the female gametophyte via <b>mitosis</b>. Chromosome segregation is the process in eukaryotes by which two sister 
chromatids formed as a consequence of DNA replication, or paired homologous 
chromosomes, separate from each other and migrate to opposite poles of the 
nucleus. This segregation process <b>occurs</b> during both <b>mitosis</b> and meiosis. ... 
Some of the recombination events <b>occur</b> by <b>crossing over</b> (involving physical&nbsp;... A bivalent is one pair of chromosomes (sister chromatids) in a tetrad. A tetrad is 
the association ... The formation of a bivalent <b>occurs</b> during the first division of 
meiosis (in the pachynema stage of meiotic <b>prophase 1</b>). In most organisms, 
each ... &quot;Meiotic <b>crossing</b>-<b>over</b>: obligation and interference&quot;. Cell. 126 (2): 246–
248. Unequal <b>crossing over</b> is a type of gene duplication or deletion event that deletes 
a sequence in one strand and replaces it with a duplication from its sister 
chromatid in <b>mitosis</b> or from its homologous chromosome during meiosis. ... 3.1.<b>1</b> 
Junk DNA ... within the sequences, the more likely unequal <b>crossing over</b> will 
<b>occur</b>. Meiosis is a special type of cell division in sexually-reproducing organisms used 
to produce the ... Meiosis <b>does</b> not <b>occur</b> in archaea or bacteria, which generally 
reproduce ... Meiosis generates gamete genetic diversity in two ways: (<b>1</b>) Law of 
... the actual act of <b>crossing over</b> is not perceivable through the microscope, and&nbsp;...
pachytene stage
Chromosomal crossover