Question

The sex determination symbol is XXY in human beings with _______ syndrome.
a. Turner's
b. Male Klinefelter
c. Female Klinefelter
d. Down's

Answer 1

Hint: A couple of X and Y chromosomes (XY) brings about a male, and a couple of X and X chromosomes (XX) brings about a female. Sex chromosome irregularities happen when an individual is feeling the loss of an entire sex chromosome (called monosomy) or has an additional sex chromosome (one extra is trisomy).

Complete answer:
> Klinefelter disorder is a condition identified with the X and Y chromosomes (the sex chromosomes). Individuals commonly have two sex chromosomes in every cell: females have two X chromosomes (46, XX), and guys have one X and one Y chromosome (46, XY). Regularly, Klinefelter's condition results from the presence of one additional duplicate of the X chromosome in every cell (47, XXY). So, option B is correct.

> A few people with highlights of Klinefelter disorder have more than one additional sex chromosome in every cell (for instance, 48, XXXY or 49, XXXXY). So, option C is incorrect.

> Down condition is a hereditary issue caused when anomalous cell division brings about an additional full or halfway duplicate of chromosome 21. This extra hereditary material causes the formative changes and physical highlights of Down disorder. So, option D is incorrect.

> Turner disorder, a condition that influences just females, results when one of the X chromosomes (sex chromosomes) is missing or somewhat absent. Turner's condition can cause an assortment of clinical and formative issues, including short stature, the disappointment of the ovaries to create, and heart surrender. So, option A is incorrect.

Hence, the correct answer is option (B).

Note: Notwithstanding influencing male sexual turn of events, variations of Klinefelter condition are related to scholarly handicap, unmistakable facial highlights, skeletal anomalies, helpless coordination, and serious issues with discourse. As the quantity of additional sex chromosomes increments, so does the danger of these medical issues. A few people with highlights of Klinefelter disorder have the additional X chromosome in just a portion of their cells; in these people, the condition is portrayed as mosaic Klinefelter disorder (46, XY/47, XXY).