How do you solve a dihibrid cross when parents are one of them (or both) heterocygous?
I mean when both are homocygous is easy, for example MMBB x MMbb, F1 would be all MMBb ... but when we have Mmbbxmmbb or MmBbxmmbb ???

Question

How do you solve a dihibrid cross when parents are one of them (or both) heterocygous? 
I mean when both are homocygous is easy, for example MMBB x MMbb, F1 would be all MMBb ... but when we have Mmbbxmmbb or MmBbxmmbb ???

alphadxg · Answer

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So you have to foil out what the parents have, once you foild it out you will get 4 different types of genotypes. for a dihybrid cross.

Then you will put them into punnet square, and cross the 4 father with the 4 mother. 

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and then you would put both the father and mothers 2 alleles in the box, and I drew arrows because they were going to be the same outcome.