Hi i was wondering if someone could give me a definition of diheterozygous and dihomozygous within a dihybrid cross. i no that heterozygous means different alleles and homozygous means the same alleles but i keep getting confused with the di in front
Thanks
In a dihybrid cross, you’re looking at the inheritence of two genes. For example, let’s say that the genes are A and B. You know that a heterozygote for one gene is Aa or Bb, and all that the "di" in front means is that both genes are heterozygous, or that both genes are homozygous (for a diheterozygote and a dihomozygote, respectively). So a diheterozygote in my example would be AaBb. A dihomozygote would be AABB or aabb.
I’ve heard diheterozygotes referred to as dihybrids much much more often, so if you hear that phrase it’s equivalent.
