As genomes become sequenced it has become evident that genes become duplicated as a mechanism of evolution. In some cases, recently duplicated genes perform identical functions. Suppose genes R and S are of unlinked genes that in fact arose recently from such a gene duplication event. If two Rr Ss individuals are mated, what would be the phenotypic ratio of their progeny. Assume r is recessive to R and s is recessive to S.
As genomes become sequenced it has become evident that genes become duplicated as a mechanism of evolution. In some cases, recently duplicated genes perform identical functions. Suppose genes R and S are of unlinked genes that in fact arose recently from such a gene duplication event. If two Rr Ss individuals are mated, what would be the
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9:7 |
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1:2:1:2:4:2:1:2:1 |
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12:3:1 |
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9:3:3:1 |
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15:1 |
The fourth option, 9:3:3:1 is the correct answer.
Here, in the question, it is mentioned that genes are not linked and thus will follow Mendel's Law of Independent Assortment. Let us look at the dihybrid cross mentioned in the question.
RrSs x RrSs
Types of gametes obtained from one parent: RS, Rs, rS, rs. Similar types will be obtained from the other parent.
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