Seen in an MRI as two individual arteries at this hairpin, a carotid artery dolichoectasia can progress so far as to produce a second hairpin turn and appear as three individual arteries on an MRI . In the case of a dolichoectasia of the Internal Carotid Artery ( ICD ), the pathogenesis is primarily related to compression of the Optic Nerves at the Optic Chiasma ( see Fig . 1 and 2 ).
32.
Since each crossover gives 50 % recombinants, the chiasma count implies a total male genetic map length of 2450 cM . The current version of the Location Database ( Collins et al ., 1996 ) suggests a total male map length of 2851 cM . Chiasmata are more frequent in female meiosis ( exemplifying Haldane's rule that the heterogametic sex has the lower chiasma count ), and the total female map length in the Location Database is 4296 cM ( excluding the X ).
33.
Since each crossover gives 50 % recombinants, the chiasma count implies a total male genetic map length of 2450 cM . The current version of the Location Database ( Collins et al ., 1996 ) suggests a total male map length of 2851 cM . Chiasmata are more frequent in female meiosis ( exemplifying Haldane's rule that the heterogametic sex has the lower chiasma count ), and the total female map length in the Location Database is 4296 cM ( excluding the X ).
34.
In meiosis is a diploid cell ( 2N ) duplicates its DNA once and undergoes two rounds of cell division to produce four haploid ( 1N ), germ cells that promotes the recombination of large expanses of chromosomal DNA, potentially similar in size to those lost or gained in cancer In meiotic division, homologous chromosomes are held together by cohesions, and after resolution of chiasma ( the recombination crossover points with the other chromosome pair ), the homologous chromosomes are segregated together . "'Meiomitosis "'is an aberrant cellular division pathway through which daughter cells following mitosis inherit partially expressed meiotic machinery.
