【读遍世界◑ 新闻广角镜】500万年后男人将灭绝

jeswu (caichi321) 铁杆会员
591 41 0
发表于:2013-05-18 13:00 [只看楼主] [划词开启]

点击查看大图


点击查看大图 Men are living on borrowed time, said Professor Graves, one of Australia’s most influential scientists.

作为澳大利亚最有影响力的科学家之一,格雷弗斯教授表示,男人正在走向灭绝。

Professor Graves’s prediction hinges around【根据】 the number of genes on the male and female sex chromosomes【染色体】. The female, or X, chromosome, contains a healthy 1,000 or so genes. What's more, girls and women have two of them. The Y chromosome started off with as many genes as its female counterpart. But over hundreds of millions of years it has crumbled away, leaving fewer than 100 genes in modern man. This includes the SRY gene, the ‘male master switch’ that determines whether an embryo is male or female.


However, there is some good news. She says that when Y chromosome falls to pieces, another chromosome could take on the role of the missing Y, leading to the creation of a new species of human.


点击查看大图 读 后 练 习


请  仅楼主可见  | 并用中文作答


格雷佛斯教授从何判断Y染色体正在走向灭绝?(100HY)


-----------以下内容回复可见-----------


最后编辑于:2013-05-18 15:07

本帖来源社刊

全部回复 (41) 回复 反向排序

  • 0

    点赞

  • 收藏

  • 扫一扫分享朋友圈

    二维码

  • 分享

课程推荐

需要先加入社团哦

编辑标签

最多可添加10个标签,不同标签用英文逗号分开

保存

编辑官方标签

最多可添加10个官方标签,不同标签用英文逗号分开

保存
知道了

复制到我的社团