Question

the number of chromosomes in klinefelter syndrome is
a) 47 (44+ XXY)
b) 47 (44+ XXX)
c) 47 (46+ 1 extra chromosome 21)
d) 47 (44+ YYY)

Answer 1

Answer:

Klinefelter's syndrome is a genetic disorder involving change in the number of chromosomes.

The genotype is 44 + XXY

So the number of chromosomes become

44 +3 = 47.

So option a) is correct.

Additional information on klinefelter's syndrome:

1. The phenotypic characteristics is that of male.

2. The person has long stature

3. He suffers from testicular atrophy

4. The person might also suffer from gynecomastia (male breast formation).

Answer 2

Answer:

Option A is Correct

Explanation:

Descriptions :-

Klinefelter syndrome is a chromosomal condition in boys and men that can affect physical and intellectual development.

Why :-

Klinefelter syndrome is not inherited; the addition of an extra X chromosome occurs during the formation of reproductive cells (eggs or sperm) in one of an affected person's parents. During cell division, an error called nondisjunction prevents X chromosomes from being distributed normally among reproductive cells as they form. Typically, as cells divide, each egg cell gets a single X chromosome, and each sperm cell gets either an X chromosome or a Y chromosome.

Mosaic Klinefelter syndrome (46,XY/47,XXY) is also not inherited. It occurs as a random error during cell division early in fetal development. As a result, some of the body's cells have the usual one X chromosome and one Y chromosome (46,XY), and other cells have an extra copy of the X chromosome (47,XXY).