There are three SNP sites: SNP1, SNP2 and SNP3, locating on the same chromosome

Question

There are three SNP sites: SNP1, SNP2 and SNP3, locating on the same chromosome in order. One of them is in a gene controlling flower color. Red flower color is dominant over white color Homozygous parent A and B have following phenotypes and genotypes Parent Phenotype Red White SNP1 SNP2 SNP3 There are 3 F2 individuals from the cross of Parent A x Parent B. Their phenotype and genotype data is shown below Phenotype Red Red White SNP3 AG Individual SNP1 SNP2 TC TC GA Which SNP site is in the flower color gene?

Explanation / Answer

The gene of color is situated on the SNP2 site of the chromosome. The domoinant color expressed by this gene is Red and the recessive color is white..

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