A human defect that is caused by nondisjuction of the sex chromosomes is?

Question

A. Sickle cell anemia
B. Hemophilia
C. Down syndrome
D. Turner syndrome

Answer 1

D. Turner syndrome
it's not down syndrome because it's asking about the sex chromosome, down syndrome is caused by 3 chromosome 21s

Answer 2

The Answer is Turner syndrome. Down syndrome is nondisjunction of the 21st Chromosome (not a sex chromosome). Turner syndrome is when the genome includes only one X chromosome (a sex chromosome). This is due to an error during meiosis. One egg will receive two X chromosomes and one egg will receive none. Therefore, if the egg that contains no X chromosomes is fertilized by a sperm that contains an X chromosome from the father, then it will develop into a fetus and a baby that will have Turner's syndrome.

Answer 3

In sex chromosomes, nondisjunction results in a number of abnormalities. Klinefelter syndrome is a disorder in which males have an extra X chromosome. The genotype for males with this disorder is XXY. People with Klinefelter syndrome may also have more than one extra chromosome resulting in genotypes which include XXYY, XXXY, and XXXXY. Other mutations result in males that have an extra Y chromosome and a genotype of XYY. These males were once thought to be taller than average males and overly aggressive based on prison studies. Additional studies however have found XYY males to be normal. Tuner syndrome is a condition that affects females. Individuals with this syndrome, also called monosomy X, have a genotype of only one X chromosome (XO). Trisomy X females have an additional X chromosome and are also referred to as metafemales (XXX).

Nondisjunction can occur in autosomal cells as well. Down syndrome is most commonly the result of nondisjunction affecting autosomal chromosome 21. Down syndrome is also referred to as trisomy 21 because of the extra chromosome.

Answer 4

the answer id D) turner syndrome it is caused by absence of one of the sex chromosome from parent cell
It can be caused either from mother or parent,
It contain XO sex chromosome
from mother if during meiosis the non disjunction resulting two sex chromosome in one daughter cell and nothing in second and if sperm fertilizes that cell it result into XO or YO offspring.
Same with sperm if during non disjunction one gets both the sex chromosome and the second gets no sex chromosome and result in only XO

thus if non disjunction occurs in male it will always gives XO
and if non disjunction occurs from female cell then it can result into XO or YO

Answer 5

Down syndrome

Answer 6

B. i am 90% sure.

the other 3 are hereditary but down sydrom is usually from alchol or a mutation not nondisjuntion.

Answer 7

E. Infidelity