The nucleolus is synthesized at which region?
- AEquator
- BPole
- CNucleolar organizer
- DNuclear envelope
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Nucleolemma is a part of
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View SolutionPolytene chromosomes were first discovered in which of the following?
Select the correct option for the following matches:
Column-$I$ Column-$II$ $(1)$ Chromosome arms are of equal length $(a)$ Submetacentric $(2)$ One arm of the chromosome is shorter $(b)$ Acrocentric $(3)$ One arm is extremely long and the other is very short $(c)$ Telocentric $(4)$ Terminal centromere $(d)$ Metacentric
| Column-$I$ | Column-$II$ |
| $(1)$ Chromosome arms are of equal length | $(a)$ Submetacentric |
| $(2)$ One arm of the chromosome is shorter | $(b)$ Acrocentric |
| $(3)$ One arm is extremely long and the other is very short | $(c)$ Telocentric |
| $(4)$ Terminal centromere | $(d)$ Metacentric |
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View Solution$A$ repeated cycle of $DNA$ replication without separation of daughter chromatids leads to the formation of
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View SolutionIn some chromosomes,non-staining secondary constrictions at a constant location are known as:
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