| 释义 |
Definition of pachytene in English: pachytenenoun ˈpakɪtiːnˈpakəˌtēn mass nounBiology The third stage of the prophase of meiosis, following zygotene, during which the paired chromosomes shorten and thicken, the two chromatids of each separate, and exchange of segments between chromatids may occur. Example sentencesExamples - Homologous chromosomes are fully aligned at the pachytene stage, and germ cells survive to complete meiosis and gametogenesis with high efficiency.
- Zygotene and pachytene chromosomes can be distinguished by their different morphology due to the extent of synapsis.
- In addition, Creighton used pachytene stage chromosomes to continue deletion mapping studies.
- During pachytene, the chromosomes are less condensed and much longer than in mitotic metaphases.
- This structural heterozygosity correlates with both a previously described recombination block and cytologically visible unpaired chromosomes at pachytene.
Origin Early 20th century: from Greek pakhus 'thick' + tainia 'band'. Definition of pachytene in US English: pachytenenounˈpakəˌtēn Biology The third stage of the prophase of meiosis, following zygotene, during which the paired chromosomes shorten and thicken, the two chromatids of each separate, and exchange of segments between chromatids may occur. Example sentencesExamples - This structural heterozygosity correlates with both a previously described recombination block and cytologically visible unpaired chromosomes at pachytene.
- In addition, Creighton used pachytene stage chromosomes to continue deletion mapping studies.
- Zygotene and pachytene chromosomes can be distinguished by their different morphology due to the extent of synapsis.
- Homologous chromosomes are fully aligned at the pachytene stage, and germ cells survive to complete meiosis and gametogenesis with high efficiency.
- During pachytene, the chromosomes are less condensed and much longer than in mitotic metaphases.
Origin Early 20th century: from Greek pakhus ‘thick’ + tainia ‘band’. |