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Last updated at 18:14 GMT, Thursday, 15 March 2012

The extinction of men

Human DNA

Human DNA

Rosie and Neil talk about a new study which suggests that men may become extinct in as little as 100,000 years. Listen to the programme to find out why this might be happenning.

This week's question: What is the ratio of men to women in the world? Is it

a) Equal – so 100 males to every 100 females.

b) 101 males to every 100 females.

c) 100 males to every 105 females.

Listen out for the answer at the end of the programme.

Listen

The extinction of men

End of Section

Vocabulary

chromosome

a very small structure in animal or plant cells

hormones

chemical substances in the body that influence cell function

pessimistic

expecting bad things to happen

ratio

numerical expression of the relative sizes between two or more values

extinction

a situation in which a life form stops existing

breathe a sigh of relief

feel happy that something unpleasant stops

depleted

reduced by a large amount

genes

units in cells that control qualities passed on through generations

natural selection

a process in nature that determines chances of survival

stereotypes

a fixed idea or image that people have about something

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