Lecture- 21 Qualitative and Quantitative Traits, Polygenes and Continuous Variations

OUTLINE NOTES

गुणात्मक और मात्रात्मक लक्षण, पॉलीजीन और सतत विविधताएं (Qualitative and Quantitative Traits, Polygenes and Continuous Variations):-

लक्षणप्रारूप (Phenotype):- किसी जीव के बाह्य लक्षणों की अभिव्यक्ति को लक्षणप्रारूप कहते हैं। ये आनुवांशिक लक्षण 3 प्रकार के होते हैं –

(Expression of external characters of an organism is called phenotype. These genetic traits are of 3 types –)

1. गुणात्मक लक्षण (Qualitative Traits):-

Ø  ये गुणवत्ता के रूप में अभिव्यक्त होते हैं।

(These are expressed in the form of quality.)

Ø  लक्षणप्रारूप के विभिन्न श्रेणियाँ होती हैं।

(There are different categories of phenotype.)

Ø  ये मोनोजेनेटिक होते हैं अर्थात 1 लक्षण को 1 ही जीन के द्वारा नियंत्रित किया जाता है।

(These are monogenetic, it mean that one trait is controlled by only one gene.)

Ø  इन पर वातावरण का बहुत कम प्रभाव होता है।

(The environment has very little effect on traits.)

Ø  उदाहरण (Example):- एक उत्परिवर्तन के कारण वंशागत, रक्त समूह

(Inherited disease caused by a single mutation, Blood type)


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