Lecture- 6 Dominance Relationships and Gene Interactions

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OUTLINE NOTES
प्रभाविता सम्बंध व जीन संक्रियायें (Dominance Relationships and Gene Interactions):-
प्रभाविता (Dominance):- एक जीन के युग्मविकल्पियों के मध्य पाया जाने वाला ऐसा सम्बंध जिसमें समान स्थिति पर एक युग्म विकल्पी दूसरे युग्मविकल्पी की बजाय अभिव्यक्त होता है, प्रभाविता कहलाती है। जो युग्म विकल्पी अभिव्यक्त होता है, उसे प्रभावी युग्म विकल्पी कहते हैं। जो युग्मविकल्पी अभिव्यक्त नहीं होता है, उसे अप्रभावी युग्म विकल्पी कहते हैं।
(Such a relationship found between alleles of a gene in which one allele at the same position is expressed instead of the other allele is called dominant. The allele which expresses is called the dominant allele. The allele which is not expressed is called recessive allele.)
1. पूर्ण प्रभाविता (Complete Dominance):- जब दो शुद्ध जनकों के मध्य क्रॉस कराते हैं तो F1 पीढ़ी की संततियों में किसी एक जनक का लक्षण प्रकट होता है तथा दूसरे जनक का लक्षण पूर्ण रूप से छुप जाता है। इस प्रक्रिया को पूर्ण प्रभाविता कहते हैं।
(When a cross is made between two pure parents, the character of one parent appear in the progenies of the F1 generation and the character of the other parent is completely hidden. This process is called complete dominance.)
उदाहरण:- मटर में पौधे की लंबाई
(Example:- Plant height in peas)
2. अपूर्ण प्रभाविता (Incomplete Dominance):- जब दो शुद्ध जनकों के मध्य क्रॉस कराते हैं तो F1 पीढ़ी की संततियों में दोनों जनकों के लक्षण मिलकर एक नया लक्षण उत्पन्न करते हैं। जिससे F2 पीढ़ी में लक्षण प्रारूप अनुपात परिवर्तित हो जाते हैं। इसे अपूर्ण प्रभाविता कहते हैं।
(When a cross is made between two pure parents, the character of both the parents mixed up to produce a new character in the offspring of the F1 generation. Due to which the phenotypic ratio changes in the F2 generation. This is called incomplete dominance.)

PURCHASE FULL NOTES
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(SCIENCE AND AGRO STUDIES)