In work that gives cranky teenagers another reason to blame their parents for all life's woes, researchers have uncovered a genetic link to happiness.

研究人员发现遗传与幸福感相关，这为脾气暴躁的青少年把生命的灾难都怪罪于父母提供了又一个理由。

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So, that suggests there is a genetic link to this.

所以，这意味着这种病有遗传性的关联。

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At first blush, those odds might seem to cast doubt on a genetic link.

乍看之下，那些机率似乎引起对基因联系的怀疑。

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But here is something that scientists now know: A team led by Professor Fu has reported the first genetic link to how much sleep we need.

VOA: special.2009.08.26

But stuttering tends to run in families, a fact that prompted Drayna and colleagues to search for a genetic link.

VOA: standard.2010.02.11

The research team suggests there may be a genetic link to both pre-eclampsia and cancer.

BBC: NEWS | Health | Pregnancy disorder link to cancer

"This substantial research suggests a genetic link between cardiovascular disease and pre-eclampsia, " a spokeswoman said.

BBC: 'Pregnancy crisis' link to heart disease

While scientists have discovered a genetic link to depression, others are also looking into brain chemistry for clues to depression.

CNN: Research on depression shows genetic and chemical link