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41. In human males, all the chromosomes are paired perfectly except one. This/these unpaired chromosome(s) is/are (NTSE Chandigarh, Stage-I, 2016-17)
Large chromosome
Small chromosome
Y-chromosome
X-chromosome
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42. Some dinosaurs had feathers although they couldnot fly but birds have feathers that help them to fly.In the context of evolution this means that (NTSE Chandigarh, Stage-I, 2014-15)
Reptiles have evolved from birds
There is no evolutionary connection between reptiles and birds
Feathers are homologous structures in both the organisms
Birds have evolved from reptiles
43. If, in a plant, red colour of the flower is do minantover white. A cross was made between a plant containing red flower and other with white flower. The cross yielded 50% white flowered plant and 50% red flowered plant. The genotype of the parent with red flower is (NTSE Delhi, Stage-I, 2014-15)
Homozygous
Heterozygous
Cannot be determined
Can be homozygous or heterozygous
44. What will be the ratio of dominant and recessive character inherited in second filial generation of monohybrid cross done by the Mendel? (NTSE Chhattisgarh, Stage-I, 2014-15)
3: 1
1 : 3
2: 3
3: 2
45. Fossils are found in (NTSE Madhya Pradesh, Stage-I, 2014-15)
Igneous rocks
Sedimentary rocks
Metamorphic rocks
All of these
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