a: Sex chromosomes ~
b: 2 jokers stuck on the end

What: "Each 'set' of chromosomes has been inherited - one set from Mum's egg; one set from Dad's sperm. Imagine that this is like having 2 suits of cards - one red; one black. You would have one red King; one black King; one red Queen; one black Queen. Imagine that the sex chromosomes are like the 2 jokers stuck on the end."An very clear page describing the genetics of twin births in human.

Writer: Not Stated
Where: Reference Link Has Evaporated
Date: Dec 10 2014 3:47 PM

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