This is a very good diagram which basically has everything on...
From this we can understand that there is a 50% chance of an offspring being male (XY) and a 50% chance of the offspring being female (XX).
image source: biologymad.com
A blog covering and explaining the Edexcel IGCSE Biology specification for the 2016 summer exams. If you are doing just double science, you do not need to learn the stuff for paper two, if you are doing triple you will need to learn all (GOOD LUCK!) I have separated the papers to make files easier to find. Hope it helps :)
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