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The Screen Guide

The sex of humans is determined by a biological lottery. However, many animals seem to be able to skew the ratio of males to females in their offspring. Crocodiles do it by temperature but how can fairy wrens ensure that they have more males than females and why do some instinctively produce males and others only females? WHICH SEX aims to throw more light on the intriguing question of sex selection in the animal world.

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Crew

Director
Mary Colwell
Writers
Mary Colwell  Jonathan Holmes
Producer
Mary Colwell
Executive Producers
Dione Gilmour

Production Details

Production Completion
1992
Genre
Natural history and environment
Production Company
ABC TV Natural History Unit

Sales

International Sales
ABC Content Sales