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词汇 spermatid
释义

Definition of spermatid in English:

spermatid

nounˈspəːmətɪdˈspərməˌtid
Biology
  • An immature male sex cell formed from a spermatocyte, which may develop into a spermatozoon without further division.

    〔生〕精子细胞

    Example sentencesExamples
    • Three trained observers reviewed each stallion's histology slides by quantifying the number of spermatids within 25 cross-sectioned round seminiferous tubules.
    • The hypothesis was confirmed in experiments using phase-contrast microscopy, which showed the presence of individualized spermatids in the mutant testes.
    • Rates of protein evolution were fastest for genes expressed during the dramatic morphogenesis of round spermatids into spermatozoa.
    • These haploid cells - now called spermatids - thus contain 23 single half chromosomes.
    • Spermatocytes, the progenitors of spermatids, are biosynthetically active cells, producing all the components that will be needed in the mature spermatozoa.

Derivatives

  • spermatidal

  • adjectiveˌspəːməˈtʌɪd(ə)l
    Biology
    • Rat spermatidal protein TP2 is rich in serine residues and has several potential sites for phosphorylation by different protein kinases.
      Example sentencesExamples
      • Two novel zinc fingers have been discovered in the mammalian spermatidal protein TP2, which recognizes human CpG islands in a zinc dependent manner.
      • Possible functions for high HMGA2 levels may include role in testis-specific events such as genetic recombination, meiotic divisions, or replacement of histones by late spermatidal basic proteins during nuclear condensation.

Definition of spermatid in US English:

spermatid

nounˈspərməˌtid
Biology
  • An immature male sex cell formed from a spermatocyte that can develop into a spermatozoon without further division.

    〔生〕精子细胞

    Example sentencesExamples
    • Rates of protein evolution were fastest for genes expressed during the dramatic morphogenesis of round spermatids into spermatozoa.
    • Three trained observers reviewed each stallion's histology slides by quantifying the number of spermatids within 25 cross-sectioned round seminiferous tubules.
    • These haploid cells - now called spermatids - thus contain 23 single half chromosomes.
    • The hypothesis was confirmed in experiments using phase-contrast microscopy, which showed the presence of individualized spermatids in the mutant testes.
    • Spermatocytes, the progenitors of spermatids, are biosynthetically active cells, producing all the components that will be needed in the mature spermatozoa.
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