3. Of course, the kernels will be colored, otherwise the kernel genetics of corn

Question

3. Of course, the kernels will be colored, otherwise the kernel genetics of corn can be more complicated. Two genes, C and R, interact duce kernel color. If at least one dominant allele is present at both genes the ypes of the Fi and use a Punnett square to show the possible genotypes and s will be white. Diagram the genotypes and phenotypes of the F2 kernels from the following Parental ears of corn: CCrr What extension to Mendelian Genetics is affecting the phenotypic rati al ears of corn: CCrrxcCRR

Explanation / Answer

According to the information, the genotype of the parents are CCrr and ccRR. Thus, the genotype of all the F1 populations would be given ny CcRr. Thus, the selfing of F1 would be leading to generation of F2 individuals and thus the cross can be found as below:

thus, the ratios for F2 can be found as below:

Genotype: CCRR: CCRr: CcRR: CcRr: CcRR: Ccrr: CcRR: ccRR: ccRr: Ccrr: ccRr: ccrr: 1:1:1:4:2:2:1:2:1:1:1

Phenotype: Colored : White :: 15:1

This phenotypic ratio is different from the usual Mendelian pattern of inheritance i.e. 9:3:3:1

CR Cr cR cr CR CCRR CCRr CcRR CcRr Cr CCRr CCrr CcRr Ccrr cR CcRR CcRr ccRR ccRr cr CcRr Ccrr ccRr ccrr

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