由于人类Y染色体长臂远端2/3处是异染色质区,所以它易发生形态学变化。Y染色体的公认作用只是决定男性,直到1975年还没有准确的基因定位在Y染色体。随着细胞遗传学技术的改进,免疫学和分子遗传学方面的进展,准确地确定了睾丸决定基因定位于人的Y染色体上。本文发现一例del(Yq)的患者,核型为:46,XY,del(Yq11:)(附图)。国内尚未见报道。病例摘要患者,男,29岁。婚后3年因爱人不孕 As the human Y chromosome long arm 2/3 at the heterochromatic region, so it is easy to morphological changes. The accepted role of the Y chromosome is only to determine the male, until 1975 there is no accurate gene located on the Y chromosome. With advances in cytogenetic technology, advances in immunology and molecular genetics, it has been precisely established that testis-determining genes are localized to the human Y chromosome. This article found a case of del (Yq) patients, karyotype: 46, XY, del (Yq11:) (with photos). Not yet reported in China. Case Summary Patient, male, 29 years old. 3 years after marriage because of love infertility