Question

The person with Turner’s syndrome has
A. 45 autosome and X sex chromosome
B. 44 autosome and XXY sex chromosome
C. 45 autosome and XXY sex chromosome
D. 44 autosome and X sex chromosome

Answer 1

Hint:-
Turner’s syndrome is defined as the disorder that shows impact only on females and occurs when one of the X chromosomes is completely or partially missing. This syndrome can cause several medical and developmental problems such as short height, failure of the development of ovaries and heart defects.

Complete step-by-step solution:-The syndrome was first discovered by Henry Turner in 1938.
- This disorder occurs mainly in females due to chromosomal abnormality.
- Turners syndrome occurs due to the Monosomy (2n-1) of a sex chromosome.
- In this disorder, an individual has 44 autosomes but only one X chromosome and the other is missing. Therefore, this is known as the 45X condition. As a result, it’s karyotype is 44A+XO or 45X.
- This is the outcome of the fusion of an aneuploid gamete (22+O) and a sperm (22+X). So the correct answer is D i.e. 44 autosome and X sex chromosome.
- These women carry only a single copy of the genes present on X-chromosomes.
- The lost chromosome affects the growth of the body. This disorder is distinguished by delayed puberty, sterility, small and non-functional ovaries and fallopian tubes and impaired learning disabilities.
- The person with Turner’s syndrome has 44 autosome and X sex chromosome. So, the correct answer is option (D).

Note:-
 In the human body, 23 pair of chromosomes are present, out of which 22 pairs are autosomes and only 1 pair is sex chromosome (X and Y). Autosomes are the pairs of chromosomes that regulate the somatic characters of the body whereas the sex chromosome are the chromosomes that determine the sex of an organism and also regulate sex-linked traits.