wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Is Down’s syndrome caused by an autosomal primary non-disjunction?


Open in App
Solution

Down's syndrome:

  1. It's a hereditary condition.
  2. The nondisjunction of the 21st chromosome is the cause.
  3. Chromosome 21 is an autosome.
  4. Trisomy 21 is another name for this syndrome.

Non-disjunction of chromosomes:

  1. It is the phenomenon that arises when the normal segregation of chromosome pairs does not occur during anaphase.
  2. It can occur either in meiosis 1 or in meiosis 2.
  3. When the gamete with an n+1 chromosome fuses with a normal gamete the resultant zygote has 3 copies of the same chromosome (Trisomy).
  4. Yes, an autosomal primary non-disjunction causes Down's syndrome.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Genetic Disorders
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon