染色体数目或结构异常引起的疾病称为染色体病。这类疾病的实质是染色体上的基因或基因群的增减或变位影响了众多基因的表达和作用，破坏了基因的平衡状态，因而妨碍了人体相关器官的分化发育，造成机体形态和功能的异常。
随着年龄的增加，源于男性的染色体疾病也有增加。
As the addition of the age, result from chromosome disease of the male also has increase.
克氏症仍是最常见的染色体疾病，染色体平衡易位核型占常染色体异常核型比例最大。
Klinefelter syndrome is still the most common chromosomal disease, balanced translocation accounts for largest proportion of autosomal abnormality.
以往的研究者已经指出过，大龄孕妇生育的孩子极易患出生缺陷、出生体重低、类似先天痴呆的某些染色体疾病。
Prior studies have indicated that babies born to older women have higher risks of birth defects, low birth weight and certain chromosome problems, such as Down syndrome.
应用推荐