Different layers of the earth exist due to what?
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You have 2 parents both Rr, so the cross will simply be Rr x Rr. Drawing a punnet square, your cross should look like this:![\left[\begin{array}{ccc}-&R&r\\R&RR&Rr\\r&Rr&rr\end{array}\right]](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-%26R%26r%5C%5CR%26RR%26Rr%5C%5Cr%26Rr%26rr%5Cend%7Barray%7D%5Cright%5D%20)
We see that when 2 heterozygotes cross, the possible genotypes for their offspring are RR, Rr, and rr. The punnet square tells us that 25% of the offspring will be RR, 50% will be Rr, and 25% will be rr. Phenotypically, this means 75% of offspring will have red eyes, and 25% will have sepia.
We see that when 2 heterozygotes cross, the possible genotypes for their offspring are RR, Rr, and rr. The punnet square tells us that 25% of the offspring will be RR, 50% will be Rr, and 25% will be rr. Phenotypically, this means 75% of offspring will have red eyes, and 25% will have sepia.