双胞胎1号、9号、16号染色体及Y染色体C带的定量分析。
Quantitative analysis of C-bands in chromosomes 1, 9, 16, and Y of twins.
作者信息
Pedrosa M P, Salzano F M, Mattevi M S, Viégas J
出版信息
Acta Genet Med Gemellol (Roma). 1983;32(3-4):257-60. doi: 10.1017/s0001566000005122.
Thirty-two pairs of Caucasoid twins, 16 monozygotic (MZ) and 16 dizygotic (DZ) of the same sex, were studied by densitometry in relation to the C-bands of chromosomes 1, 9, 16, and Y. Confirming earlier results, concordance was not absolute among MZ. Estimates of the degree of genetic determination for these traits varied from 0.73 to 0.89 for the autosomes and from 0.86 to 0.95 for the Y. There are now stronger indications that a fraction of the intergeneration variability found in these structures may be real, probably due to mitotic and/or meiotic unequal crossing-over.
对32对高加索双胞胎进行了研究，其中16对为同性别单卵双胞胎（MZ），16对为同性别双卵双胞胎（DZ），通过密度测定法研究了与1号、9号、16号染色体以及Y染色体的C带的关系。与早期结果一致，MZ双胞胎之间的一致性并非绝对。这些性状的遗传决定程度估计，常染色体为0.73至0.89，Y染色体为0.86至0.95。现在有更强的迹象表明，在这些结构中发现的一部分代际变异性可能是真实的，可能是由于有丝分裂和/或减数分裂过程中的不等交换。
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