[单项选择]

Charles Darwin wed his cousin Emma and spawned 10 children, including four brilliant scientists. Albert Einstein’s second wife Elsa was his first cousin. Queen Victoria said “I do” to hers. So have millions worldwide. In parts of Saudi Arabia, 39% of all marriages are between first cousins.
In the U. S., though, the practice bears a stigma of inbreeding just this side of incest. The taboo is not only social hut legislative; 24 states ban the marriage of first cousins: five others allow it only if the couple is unable to bear children. A major reason for this ban is the belief that kids of first cousins are tragically susceptible to serious congenital illnesses.
That view may have to change. A comprehensive study published recently in the Journal of Genetic Counseling indicates such children run an only slightly higher risk of significant genetic disorders like congenital heart defects — about two percentage points above the average 3% to 4%
A. It suggests kids of first cousins suffer from heart defects
B. It was funded by its lead author Robin Bennett
C. It will change people’s opinion of cousin marriages
D. It has lifted the medical ban and removed the social stain

最新试题

• ●    中年男性，运动后出现肾绞痛及血尿来院就诊，应首先考虑到（）
• ●    [单选题]“十年离别后，长大一相逢，问姓惊初见，称名忆旧容”，这是一种()。
• ●    耙装机安装固定楔眼最好与工作面成（）的偏角。
• ●    代理的种类有哪些？
• ●    石墨炉原子吸收光度法测定水中镉、铜和铅的最好基体改进剂是（）
• ●    关于过程状态的说法，正确的有（）。