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Uberfacts, a Twitter account with 9.43M followers claims that 80% of a child's intelligence is acquired from the mother. How true is this?

Gizmodo doesn't do a very good job of debunking this:

FALSE. This fun fact is a favorite of those who think that intelligence is mostly genetic, and yet don't cite any reliable sources. That 80 percent figure seems to be pulled from thin air, no doubt an incredibly warped version of something that may actually be true.

marked as duplicate by Jamiec Sep 9 '16 at 7:26

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    What is "aquired from the mother" supposed to mean in this context? – Christian Feb 13 '15 at 13:06
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    @Oddthinking It's related but not a dupe. That questions if IQ is decided by nature and not nurture. This, assuming the former, pits mother vs. father as the source of the child's IQ. – user7920 Feb 13 '15 at 13:30
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    @coleopterist If the claim were true, the cause could still easily be nurture rather than nature: assume for example that mum is the primary caregiver, and that development of intelligence in the infant (as the result of interaction with their primary caregiver) is paramount. – ChrisW Feb 13 '15 at 13:52
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    Why's this so heavily downvoted? Seems like a claim worth investigating – user5341 Feb 13 '15 at 18:12
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    @JonStory - IQ is a measurement. Whether you find it the best measurement or not, is a different story. But it's a quantifyablle measurement. And its heritability CAN be measured. And has been. And the breakdown between parent's IQ can be measured as well. Seems eminently answerable via a study. – user5341 Feb 17 '15 at 16:29