Jose F.

asked • 12/11/12

How many chromosomes do humans have?

I want to know how many chromosomes humans have.

Awesome G.

23 pairs
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09/17/19

12 Answers By Expert Tutors

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Thomas C. answered • 04/03/20

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5 (3)

Biotech Researcher For Math and Science Tutoring

Jeanette W.

Then what causes fragile X syndrome?
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09/17/21

Abbas S.

Fragile X syndrome is one of a handful of trinucleotide repeat expansion disorders. In this case, it is a repeat of "CGG" in the FMR1 gene (~200+ to 1000; normally ~40). This occurs due to a failure during the DNA repair process, leading to hypermethylation, and thus decreased expression of the gene. Individuals will have findings of enlarged testes (post-pubertal), long face and jaw, autism, MVP.
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10/05/21

Christine M. answered • 09/26/19

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New to Wyzant

Experience both in teaching and the real world.

Jody P. answered • 01/26/22

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New to Wyzant

Experienced high school tutor specializing in AP Biology

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