Which one of the following x-linked disorders is caused by an abnormal number of repeat sequences in the genome and is the most common cause of inherited mental impairment?
A) fragile X syndrome
B) Klinefelter syndrome
C) Williams syndrome
D) cri du chat syndrome
E) Down syndrome
Ans: A) fragile X syndrome
Biology & Microbiology
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Biology & Microbiology
How do auxin and cytokinin work in apical dominance?
What will be an ideal response?
Biology & Microbiology
Which layer of the stomach wall is modified into deep folds?
A) serosa B) mucosa C) submucosa D) muscularis
Biology & Microbiology
Which of the following is true of chemical bonds?
A) Electrons are always shared. B) Electrons can be shared or completely transferred. C) Chemical bonds cannot occur between two identical atoms. D) Atoms can achieve a higher energy state and less stability by forming bonds.
Biology & Microbiology