Question

What can explain the phenomenon where the same genotype might give rise to different phenotypes? A. codominance B. pleiotropy C. complete dominance D. recessive lethal E. Incomplete dominance

Answer 1

What can explain the phenomenon where he same genotype might give rise to different " Answer: ® Pleiotropy Explanation. The action of gene at cellular level is - unitary le, one gene one action. But some genes produce a broad spectrum of phenotypic changes, so that a gene has multiple actions. - Lethal genes usually have pleotropic effect Example » Yellow Lethal in mice. - In 1905 , Cuenot first reported the inheritance of body colour of mouse and observed that the inheritance of yellow eolour usually did not fit with usual Mendelian pattern. By back crossing he observed that all yellow mice were heterozygous and no Chomozygoue yellow could be found. According to him, yellow had a dominant phenotypic effect and at the same time a recessive lethal, so the homozygous yellow rice were nou-viable. - Parent Yy X Yy . (yellow) (yellow) OV me E F олал hion - ОРГу A 2:1 1 Cyellow) (yellow) (Agenti) AUX 0