Feng and Herbert (2006) concluded that 3PN embryos have 61.8% of triploid chromosome complement
, 25.2% of mosaic arrangements, and only 12.65 of them had a diploid chromosome (22).
CHMs are purely androgenetic conceptions (only paternal genetic material is present) and usually diploid (2 paternal chromosome complements
without a maternal chromosome complement
) (16); most result from fertilization of an ovum devoid of maternal genetic material by a single sperm that duplicates (monospermy; ~85%), (17-19) but a subset is due to fertilization by 2 sperm (dispermy).
After detailed history and examination, the current approach is to (a) identify the sex chromosome complement
by karyotype analysis or FISH with X and Y probes and chromosome microarray; (b) gather additional phenotypic information by complete metabolic and endocrine testing as well as imaging studies, and (c) genetic testing for copy number variants in regions associated with known DSD genes or gene sequencing either for single candidate gene or a gene panel.
and male meiosis in Hersilia savignyi Lucas (Hersiliidae), Larinia sp.
More specifically, an abnormal chromosome complement
characterized by the presence of additional quantifiable material of unknown origin was identified at band 7p15 in each metaphase cell analyzed.
Summary of the long-surviving cases (>45 days) of triploidy reported in the literature and the origin of the additional haploid chromosome complement
Study Survival Parental origin Karyotype Fryns et al.
Diploid (2n) is the homeostatic chromosome complement
of the basic n-aggregate for most species.
In addition to this normal chromosome complement
, sometimes additional chromosomes are found, called B chromosomes (Bs).
Cultured peripheral blood from this patient revealed a normal female 46, XX chromosome complement
. Genetic analysis revealed no gene abnormality.
A chromosome race is defined as a group of geographically contiguous or recently separated populations, which share the same chromosome complement
The results provide insight into the sex chromosome complement
in the most-recent common ancestor of the Cyprinodontina.
The chromosome complement
of a female (174) from Mbarigui, the type locality of Ctenomys dorbignyi was 2n = 70 FN = 84, confirming the characteristic karyotype of this species, which possesses the highest diploid number of the genus (Fig.