It is observed that pea plants with white flowers have colourless seed coats and leaf axils. This shows that the gene for flower colour affects more than one characteristics.The given observation exemplifies the:
Correct answer: C. Pleiotropic inheritance
- A. Epistatic inheritance
- B. Polygenic inheritance
- C. Pleiotropic inheritance
- D. Incomplete dominance
Explanation
The correct answer is pleiotropic inheritance. This genetic phenomenon occurs when a single gene influences multiple phenotypic traits, as seen in the observation where the gene for flower color also affects seed coat and leaf axil colors. This differs from epistatic inheritance, where one gene masks the expression of another, and polygenic inheritance, where multiple genes affect a single trait. Incomplete dominance is unrelated, as it involves blending of traits in heterozygotes.
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About Mendel's Laws of Inheritance
Mendelian inheritance explains how alleles separate into gametes and assort during reproduction, producing predictable genotype and phenotype ratios. Questions cover dominance, recessiveness, homozygous and heterozygous conditions, the laws of segregation and independent assortment, monohybrid and dihybrid crosses, test crosses and the limits caused by linked genes.
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