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Failure of cytokinesis after telophase s...

Failure of cytokinesis after telophase stage of cell devision results in an increase in a whole set of chromosomes in an organism. The phenomenon is called as

A

polyploidy

B

aneuploidy

C

haploidy

D

diploidy

Text Solution

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The correct Answer is:
A
Polyploidy is the phenomenon of having more than two genomes or two sets of chromosmes. It occurs in nature due to the failure of chromosomes to separate at the time of anaphase either due to non-disjunction or due to non-formation of spindle. Cytokinesis does not occur after telophase stage leading to polyploidy.
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Chromosomal disorders are caused due to absence or excess or abnormal arrangement of one or more chromosomes. Failure of segregation of chromatids during cell division cycle results in the gain or loss of a chromosome, and is called aneuploidy. Failure of cytokinesis after telophase stage of cell division results in an increase in a whole set of chromosomes in an organism and, this is known as polyploidy. Turner's syndrome is caused due to ............... of one of the X chromosome.

Chromosomal disorders are caused due to absence or excess or abnormal arrangement of one or more chromosomes. Failure of segregation of chromatids during cell division cycle results in the gain or loss of a chromosome, and is called aneuploidy. Failure of cytokinesis after telophase stage of cell division results in an increase in a whole set of chromosomes in an organism and, this is known as polyploidy. The risk of developing congenital heart diseases more in case of :

Knowledge Check

  • Chromosomal disorders are caused due to absence or excess or abnormal arrangement of one or more chromosomes. Failure of segregation of chromatids during cell division cycle results in the gain or loss of a chromosome, and is called aneuploidy. Failure of cytokinesis after telophase stage of cell division results in an increase in a whole set of chromosomes in an organism and, this is known as polyploidy. This genetic disorder called ................. is caused due to the presence of an additional copy of ...........-Chromosome resulting into a karyotype of 47, XXY. Identify the disorder.

    A
    Down's syndrome, Y
    B
    Klinefelter's syndrome, X
    C
    Turner's syndrome, X
    D
    Phenylketoneuria, Y

  • Chromosomal disorders are caused due to absence or excess or abnormal arrangement of one or more chromosomes. Failure of segregation of chromatids during cell division cycle results in the gain or loss of a chromosome, and is called aneuploidy. Failure of cytokinesis after telophase stage of cell division results in an increase in a whole set of chromosomes in an organism and, this is known as polyploidy. Short stature, rounded head, furrowed tongue could be a result of ....... .

    A
    Down's syndrome
    B
    Klinefelter's syndrome
    C
    Turner's syndrome
    D
    Phenylketoneuria

  • Chromosomal disorders are caused due to absence or excess or abnormal arrangement of one or more chromosomes. Failure of segregation of chromatids during cell division cycle results in the gain or loss of a chromosome, and is called aneuploidy. Failure of cytokinesis after telophase stage of cell division results in an increase in a whole set of chromosomes in an organism and, this is known as polyploidy. There are a total number of .......... pairs of autosomes in a normal human cell.

    A
    22
    B
    23
    C
    24
    D
    25

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