I have brown hair that's heterozygous with blonde we'll call that Xx and green eyes, which is a mutation of blue, so you could say my eye traits are homozygous --bb. If I had children with someone with hetero brown eyes Bb, and hetero brown hair Xx the result o
if you look at it, I have a 2/16 or 12% chance in having children with both blonde hair and blue/green eyes in that particular example. People are a "touchy" example with genetics like this...but if you compare it to plants you could plant 16 of them from the same cross and *maybe* get two that have the recessive traits...
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If I have children with someone that has homozygous brown eyes BB--there is a 0% chance of me having children with blue eyes...my grandchildren might though.
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If I have children with someone that has blue/green eyes, I have a 100% chance of having children with blue/green eyes
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Exactly. Just a nitpick though. Humans have about 14 color deciding genes, for eyes, hair, and skin, and green isn't a mutation on blue exactly. Dark skin usually means dark hair, but it's clearly different pigment genes as shown here:Â
http://en.wikipedia.org/wiki/File:Vanuatu_blonde.jpg
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Edit: In regards to your first point, I don't think I mentioned anything about F2 being the same as F1. If I did, sorry for the confusion. I meant that if it is pollinated by another plant it resets the counter because of new material being put in the cross, resulting in a whole new set of genes it has to make homozygous.