Hybrid cross between rr by another by parents the number of rr viva genotypes in f2 generation will be
Answers
Genes which control multiple unrelated features are said to be pleiotropic. For example, Mendel’s flower color gene specifies a protein that causes coloured particles or pigments. This protein works in several different parts of the pea plant (flowers, seed coat, and leaf axils). In this way, the unrelated phenotypes can be traced back to a defect in one with several jobs.
Importantly, alleles of pleiotropic genes are transmitted in the same way as the alleles of the genes that affect single traits. Although the phenotype has multiple elements, these elements are specified as a package, and the dominant and recessive versions of the package would appear in the offspring of two heterozygotes in a ration of 3:1.
Therefore, the number of genotypes obtained in the F2 generation would be the same as in a regular dihybrid cross.
The genotypic ratio of a dihybrid cross is 1:2:1:2:4:2:1:2:1. Hence, there are a total of 9 genotypes.
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