Question

The person with Turner's syndrome has
A. 45 autosomes and X-sex chromosomes.
B. 44 autosomes and XYY sex chromosomes
C. 45 autosomes and XXY sex chromosomes
D. 44 autosomes and X sex chromosome

Answer 1

Hint: It is an example of a chromosomal disorder. These disorders are caused by an absence or due to excess or abnormal chromosomal arrangements in one or more than one chromosome. These chromosomal disorders are genetic and cannot be cured.

Step by step answer:Conditions caused are:
Aneuploidy- It occurs when the chromatids fail to segregate during cell division of cell cycle resulting in loss or gain of chromosome(s). For example, Down's syndrome and Turner's syndrome.
Polyploidy- This condition occurs because the failure of cytokinesis occurs after the telophase stage of cell division which in contrast, causes an increase in the whole set of chromosomes in an organism. The condition mainly seen in plants. There are many conditions or disorders which occur due to chromosomal defects including trisomy, monotony, Down's syndrome, Turner's syndrome, Klinefelter's syndrome, etc.
Option -A- 45 autosomes and X-sex chromosome
This condition is as such not seen in any case as the defect in both the autosomes and sex chromosomes is not seen. So this option is as such incorrect.
Option -B-44 autosomes and XYY sex chromosomes
This condition is caused by one in 1000 boys. This is known as Jacob's syndrome, XYY karyotype or sometimes it is called YY syndrome. It occurs when a male got an extra copy of the Y chromosome in each of their cells.
Option -C-45 autosomes and XXY sex chromosomes
This condition as such is not seen or noticed as in this case abnormality is seen in both the autosomes and sex chromosomes. This option is incorrect.
Option -D- 44 autosomes and X sex chromosome
This is the result of Turner's syndrome. This condition is seen in females. In this condition absence of X-chromosome occurs I.e. 45 chromosomes with X0, such females having rudimentary ovaries, not well-developed feminine character, lack of secondary sexual characters, etc. This is the condition of Turner's syndrome.
So, the correct answer to this question is the option” D” 44 autosomes and X sex chromosome

Note: Chromosomal disorders are inheritable as such and are not curable. These defects may occur on any of the autosomes pair of sex chromosomes with addition or depletion of any chromosome in a pair. Such persons having any of these defects have many defects of the body with less body growth or underdeveloped functions of the body.