is it always AaBb x AaBb ??
thnxx
thnxx
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That makes no sense mate.
A dihybrid cross is used to discover the potential genotypes of ofspring looking at two alleles of different chromosomes.
The Aa Bb related to first the dominance of the allele and secondly if the parent is homo or hetero zygous.
Look at the question, if both parents are heterozygous for both alleles then yes your interpretation is correct, how ever one of the parents could easily be homo dominant for both alleles AABB or for one set and homo recsessive for the other. AAbb, you really need to read the question and look. But in answer NO, there can be a variety of different pairings.
A dihybrid cross is used to discover the potential genotypes of ofspring looking at two alleles of different chromosomes.
The Aa Bb related to first the dominance of the allele and secondly if the parent is homo or hetero zygous.
Look at the question, if both parents are heterozygous for both alleles then yes your interpretation is correct, how ever one of the parents could easily be homo dominant for both alleles AABB or for one set and homo recsessive for the other. AAbb, you really need to read the question and look. But in answer NO, there can be a variety of different pairings.