Question

which is true? down syndrome is the one inherited disorder that results from an extra copy of an entire chromosome. down syndrome is caused by errors in fertilization. nondisjunction can only produce gametes with extra chromosomes, not missing chromosomes. errors in chromosome segregation can occur in either the first or second meiotic division.

Answer 1

The true statement is "Down syndrome is the one inherited disorder that results from an extra copy of an entire chromosome". There are three chromosomes, rather than two, of chromosomes 21. This condition can cause developmental and intellectual delays.

What are the signs and symptoms of down syndrome?

The signs and symptoms of down syndrome may include:

1. Distinctive facial features such as flattened nose and face, protruding tongue, tiny white spots on the eye, upward slanting eye lids, and so on.
2. Other physical characteristics that are short neck, small head, small ears, broad and short hands, relatively short height, and so on.
3. Intellectual disabilities are from mild to moderate.
4. Skeletal abnormalities and poor muscle tone.
5. Heart, kidney and thyroid issues.
6. Infections of respiratory system.
7. Excessive flexibility.
8. Vision and hearing impairment.
9. Wide space between the great and second toe.
10. Less responsive.

A child with down syndrome will have some or all the signs and symptoms. Those mentioned are some signs and symptoms of down syndrome. There are some others.

Learn more about down syndrome:

https://brainly.com/question/9782041

#SPJ4