$A$ cell has $32$ chromosomes. It undergoes mitotic division. What will be the chromosome number $(n)$ during metaphase? What would be the $DNA$ content $(c)$ during anaphase?
(A) $\Rightarrow$ In mitosis,the number of chromosomes remains constant throughout the process. Therefore,during metaphase,the chromosome number remains $32$.
$\Rightarrow$ During the $S$ phase of interphase,the $DNA$ content doubles. If the initial $DNA$ content is $2c$,it becomes $4c$ after replication. During anaphase,the sister chromatids separate,but the total $DNA$ content of the cell remains $4c$ until cytokinesis is completed.
$\Rightarrow$ During the $S$ phase of interphase,the $DNA$ content doubles. If the initial $DNA$ content is $2c$,it becomes $4c$ after replication. During anaphase,the sister chromatids separate,but the total $DNA$ content of the cell remains $4c$ until cytokinesis is completed.
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Similar Questions
During which phase$(s)$ of the cell cycle does the amount of $DNA$ in a cell remain at the $4C$ level,if the initial amount is denoted as $2C$?
MediumNEET 2014
View SolutionMatch the following:
Column-$I$ Column-$II$ $A$. $G_2$-phase $1$. First phase of prophase-$I$ $B$. Anaphase $2$. Proteins are synthesized in preparation for mitosis $C$. Leptotene $3$. Terminalisation of chiasmata $D$. Diakinesis $4$. Centromeres split and chromatids separate
| Column-$I$ | Column-$II$ |
| $A$. $G_2$-phase | $1$. First phase of prophase-$I$ |
| $B$. Anaphase | $2$. Proteins are synthesized in preparation for mitosis |
| $C$. Leptotene | $3$. Terminalisation of chiasmata |
| $D$. Diakinesis | $4$. Centromeres split and chromatids separate |
Medium
View SolutionMatch the following columns and select the correct option:
Column-$I$ Column-$II$ $(1)$ Attachment of spindle fibers to kinetochores $(a)$ Prophase $(2)$ Formation of contractile ring in cytoplasm $(b)$ Telophase $(3)$ Decondensation of chromosomes $(c)$ Cytokinesis $(4)$ Condensation of chromosomal material $(d)$ Metaphase
| Column-$I$ | Column-$II$ |
| $(1)$ Attachment of spindle fibers to kinetochores | $(a)$ Prophase |
| $(2)$ Formation of contractile ring in cytoplasm | $(b)$ Telophase |
| $(3)$ Decondensation of chromosomes | $(c)$ Cytokinesis |
| $(4)$ Condensation of chromosomal material | $(d)$ Metaphase |
Medium
View SolutionSelect the correct match for $X$ and $Y$:
Column $X$ Column $Y$ $(1)$ Tetrad $(P)$ Zygotene stage $(2)$ Chiasmata $(Q)$ Diplotene stage $(3)$ Splitting of centromere $(R)$ Meiosis $(4)$ Bivalent $(S)$ Pachytene stage $(T)$ Anaphase $(U)$ Mitosis
| Column $X$ | Column $Y$ |
| $(1)$ Tetrad | $(P)$ Zygotene stage |
| $(2)$ Chiasmata | $(Q)$ Diplotene stage |
| $(3)$ Splitting of centromere | $(R)$ Meiosis |
| $(4)$ Bivalent | $(S)$ Pachytene stage |
| $(T)$ Anaphase | |
| $(U)$ Mitosis |
Difficult
View SolutionMitosis does not differ from meiosis in which of the following aspects?
Easy
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