female:male ratio in K-3 kids

[Jennifer S Kassie]

Sophie Wilson (sophiewi at uoguelph.ca) wrote:
: And I dimly remember from a biology class that as women 
: age, they are more likely to produce female babies than male babies.  Is 
: it possible that the average age of the MOTHERS might be a factor here?


But doesn't the male (who carries both X and Y chromosomes) determine the 
sex of the baby?  Females can ONLY contribute an X chromosme.  

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