IGNOU LSE 3 SOLVED ASSIGNMENT 2025

Ques 1.

लिंग निर्धारण में पर्यावरण की भूमिका को उदाहरण देते हुए विस्तार से समझाइए।

Ques 2.

वाटसन और क्रिक के DNA संरचना के मॉडल का वर्णन कीजिए। इसमें चारगॉफ द्वारा दिए गए आँकड़े किस प्रकार सही बैठते हैं?

Ques 3.

क्या ससीमकेन्द्रकों पर ओपेरॉन संकल्पना लागू होती है? ससीमकेन्द्रक में जीन नियमन की एक क्रियाविधि को विस्तार से बताइए।

Ques 4.

ड्रोसोफिला मक्खियों की एक यादृच्छिकतः संगम करने वाली प्रयोगशाला समष्टि में 4 प्रतिशत मक्खियों का रंग काला (autosomal recessive यानी अलिंगसूत्री अप्रभावी, black, b) है तथा 96 प्रतिशत का रंग भूरा (normal colour brown, B) है। यदि इस समष्टि को हार्डी वाइनबर्ग साम्यावस्था में माना जाए तो B तथा b की युग्मविकल्पी आवृत्तियों और BB तथा Bb की जीनप्ररूपी आवृतियाँ क्या होंगी?

Ques 5.

उत्परिवर्तनों के आण्विक आधार को विस्तार से समझाइए।

Ques 6.

विभिन्न लिम्फोसाइटों की सूची बनाइए। उनके प्रकार्य, विभेदन के स्थल तथा उनसे पैदा होने वाले प्रतिरक्षा प्रकारों का उल्लेख कीजिए।

Ques 7.

कृषि पौधों को उन्नत बनाने के किन्हीं दो तरीकों का वर्णन कीजिए।

Ques 8.

रासायनिक उत्परिवर्तजन

Ques 9.

ABO रुधिर वर्ग प्रणाली

Ques 10.

स्वप्रतिरक्षित रोग

Ques 11.

आनुवंशिक परामर्श

Ques 12.

डी.एन.ए. रूपातंरण को दर्शाने वाले ग्रिफिथ प्रयोग का वर्णन कीजिए।

Ques 13.

आनुवंशिक अभियांत्रिकी का प्रयोग भोजन के पोषणजमान के सुधार के लिए किया जा सकता है। विस्तार से व्याख्या कीजिए।

Ques 14.

आनुवंशिक अभियांत्रिकी के विभिन्न अनुप्रयोगों का वर्णन कीजिए।

Ques 15.

Describe with appropriate examples the role of environment in the determination of sex.

Ques 16.

Detail the Watson and Crick model of DNA structure. How did it fit in the data provided by Chargaff?

Ques 17.

Does the operon concept apply to eukaryotes? Describe a suggested mechanism for gene regulation in eukaryotes.

Ques 18.

In a randomly mating laboratory population of Drosophila, 4 per cent of the flies have black bodies (black is autosomal recessive, b) and 96 per cent have brown bodies (normal colour, B). If this population is assumed to be in Hardy-Weinberg equilibrium, what are the allelic frequencies of B and b, and the genotypic frequencies of BB and Bb?

Ques 19.

Detail the molecular basis of mutations.

Ques 20.

Enlist the different types of lymphocytes. Mention their function, site of differentiation, and the type of immunity imparted by them.

Ques 21.

Describe any two modern methods for the improvement of crop plants.

Ques 22.

Describe in brief the following:

i) Chemical mutagens

ii) ABO Blood group system

iii) Autoimmune diseases

iv) Genetic counselling

Ques 23.

Describe Griffith's experiment to show transformation in DNA.

Ques 24.

Genetic engineering can be used for improving nutritional value of food. Explain in detail.

Ques 25.

Describe the various applications of genetic engineering.

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