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- postzygotic nondisjunction 合子后(染色体)不分离
- In postzygotic isolating mechanisms mating occur, but the resulting hybrid organism is inviable or sterile. 在合子后隔离机制中,匹配可以进行,但或不产生杂种或杂种不育。
- Alternatively, like allopolyploids, they may arise by the nondisjunction of chromatids during the mitotic division of a zygote. 与异源多倍体相似的是,它们也是在有丝分裂中合子的染色单体不分离形成的。
- Results 64% of oocytes were normal, 36% of oocytes were aneuploidy, of which 22% were due to nondisjunction and 14% unbalanced predivision. 结果64%25的卵细胞核型正常,36%25的卵细胞为非整倍体,其中22%25为同源染色体不分离,14%25为姐妹染色单体非平衡性过早分离。
- Autopoly-ploids may arise from the fusion of diploid gametes that have resulted from the NONDISJUNCTION of chromosomes at meiosis. 同源多倍体通常可能来自在减数分裂过程中染色体不分离导致的二倍体融合。
- Nondisjunction of chromosome 21 is much more frequent than loss in vivo and in vitro.No significant difference in nondisjunction between male and female was noted. 21号染色体不分离与年龄的关系极显著,无论在体内还是体外,21号染色体不分离远远高于丢失。
- These postzygotic barriers may be a by-product of changes in the internal genetic environment (intrinsic isolation) or in the external ecological environment (extrinsic isolation). 这些合子后的隔离可能是在内环境中或外界生态环境中的副反应。
- See nondisjunction. 参见nondisjunction。
- Aneuploidy The condition, resulting from nondisjunction of homologous chromosomes at meiosis, in which one or more chromosomes are missing from or added to the normal somatic chromosome number. 非整倍性:在减数分裂的过程中同源染色体不分离而造成的一条或多条染色体的缺失或增加。
- cytological numerical nondisjunction 细胞(数量)不分离
- cytological(numerical)nondisjunction 细胞(数量)不分离
- Keywords chromosome nondisjunction;Down syndrome;parental origin; 染色体不分离;先天愚型;双亲起源;
- postzygotic 合子后的
- postzygotic isolation 合子后隔离
- postzygotic isolation mechanism 合子后隔离机理
- nondisjunction gate “或非”门
- secondary nondisjunction 二次不离开,次级不离开
- Y chromosomal nondisjunction Y染色体不分离
- partial nondisjunction 局部不离开
- chromosome nondisjunction 染色体不分离