In the following statements, choose the alternate correct word given in parenthesis.
(i) The DNA regions in chloroplast could be observed under (light microscope/electron microscope).
ii) The regions containing cpDNA are called (nucleoids/celluloids).
iii) Each nucleoid contains (a single/a few) copies of DNA.
iv) The cpDNA and surDNA are usually (circular/linear) in nature.
v) Both chloroplast and mitochondria contain (a few/many) copies of DNA.
vi) The DNA of yeast is (bigger/smaller) than w/DNA of humans.
vii) The occurrence of introns is discovered in (yeast/human).
(i) The DNA regions in chloroplast could be observed under electron microscope.
(ii) The _____ ___ ____ ________ ______ ________ ________.
______ ________ ______ ______ ________.
________ ____ ____ ___ __________ ______ ____ ________ _______.
__________ ___ ____ __________ _______.
_________ _________ __________ __________ _________ _____.
_________ _____ _____ __________ __________ ___ _________ ____.
___ ______ _____ ____ ________ _________.
______ __________ __________ _______ ____ ___ ___.
________ _________ _____ ____.
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In the following statements, choose the alternate correct word given in parenthesis.
(i) The DNA regions in chloroplast could be observed under (light microscope/electron microscope).
ii) The regions containing cpDNA are called (nucleoids/celluloids).
iii) Each nucleoid contains (a single/a few) copies of DNA.
iv) The cpDNA and surDNA are usually (circular/linear) in nature.
v) Both chloroplast and mitochondria contain (a few/many) copies of DNA.
vi) The DNA of yeast is (bigger/smaller) than w/DNA of humans.
vii) The occurrence of introns is discovered in (yeast/human).
Explain the natural causes of extinction of a species.
In Drosophila, the recessive, sex-linked genes, abnormal eyes facet (fa) and singed bristles (sn) show 18 percent recombination.
a) If a singed male is crossed to a female, what phenotypes are expected in the F1?
b) If the F₁ males and females are inbred, what phenotypic proportions would be expected to occur in F₂ males and females?
ड्रोसोफिला में, प्रसामान्य नेत्र फलक (facet fa) और सिंग्ड शूक (singed bristles - sh) जीन अप्रभावी तथा लिंग सहलग्न हैं। ये 18 प्रतिशत पुनर्योजन दर्शाते हैं।
आनुवंशिक विचलन
Define mutation. Explain the following types of mutations briefly:
a) Induced mutations
b) Suppressor mutations
त्रिगुणसूत्रता 13-पटाउ सिन्ड्रोम को विस्तार से समझाइए।