hyperhaploidy

plural hyperhaploidies

1. uncountableusuallyThe state of having more than the haploid complement of chromosomes.

   Additional work is required to confirm the real frequency of hyperhaploidy in the heterogeneous population of germ cells retrieved at testicular level.

   2000, Bernardini L, Gianaroli L, Fortini D, Conte N, Magli C, Cavani S, Gaggero G, Tindiglia C, Ragni N, Venturini PL, “Frequency of hyper-, hypohaploidy and diploidy in ejaculate, epididymal and testicular germ cells of infertile patients”, in Human Reproduction, volume 15, number 10, →DOI, →PMID, pages 2165–2172

   1 more example

   The frequency of sperm-derived hyperhaploidy did not differ significantly between the in vivo (3.4%) and in vitro (5.9%) populations, but did between unaged (2.5%) and aged (6.8%) sperm (chi c2 = 5.74, P less than 0.01). All hyperhaploid zygotes had a complement of n + 1 chromosomes, except the 14-d in vitro group, where complements of n + 2 and n + 3 chromosomes were seen.

   1992, MC Sapp, PA Martin-DeLeon, “Sperm age, sex ratio, and hyperhaploidy frequency in mice”, in Cytogenetics and Cell Genetics, volume 61, number 1, →DOI, →PMID, pages 61–66