染色体数目

• At fertilization , when the haploid gametes fuse , the diploid number of chromosomes is restored
  受精过程中，单倍体配子融合，恢复了二倍体的染色体数目。
• Chromosome number also gives an indication of polyploidy , where numbers vary by exact multiples between related species
  当多倍性现象发生时，物种的染色体数目是原来的整数倍。
• Autopolyploidy a type of polyploidy involving the multiplication of chromo - some sets from only one species
  同源多倍性：通常是由同一个体，同一纯种的染色体数目加倍而成的多倍性现象。
• The chromosome number of hybrids is 38 other than the expected value 35 . polymorphism in karyotypes of hybrids was also observed
  然而，根据研究结果，杂种子贝的染色体数目并非预期的35条，而是38条。
• The second meiotic division thus gives rise to two cells with the diploid number of chromosomes , one of which divides parthogenetically to form an cmbryo
  在第二次减数分裂中上升为两个细胞包含双倍体的染色体数目，其中的一个分裂形成胚胎。
• Muntiacinae include muntiacus and elaphodus , they belong to cervidae . many researchers pay attention to the cytogenetics character of these animals
  目前已知的该类动物的染色体数目从2n = 6 48不等，而且出现种内核型多态，是研究动物进化的理想材料。
• For example , if the haploid number is 7 , the euploid number would be 7 , 14 , 21 , 28 , etc , and there would be equal numbers of each different chromosome
  例如，一种生物单倍体染色体数目是7 ，整倍数将是7 、 14 、 21 、 28等数目，并且每条不同的染色体有相等的数目。
• A species can be characterized by its karyotype since the number , size , and shape of chromosomes vary greatly between species but are fairly constant within species
  由于不同物种的染色体数目、大小和形状有很大区别并且具有稳定性，因此核型可以为某一物种的特征。
• These showed qinchuan - scalper skin fibroblast cells were normal cells at four passages . 7 ) qinchuan - scalper skin fibroblast cells containted chromosome content at least the eighth passage
  染色体检查表明：第八代秦川牛皮肤成纤维细胞仍然保留着染色体数目的完整性。
• Most plants can pollinate others only if the recipients and the donors have certain features in common such as the same chromosome number life cycle or preferred habitat
  大多数植物要相互授粉，彼此之间必须有些共通之处，例如相同的染色体数目相同的生命周期或适合的栖地。