Discussions By Condition: Rare Disases

XY Chromosomes

Posted In: Rare Disases 1 Replies
  • Posted By: Anonymous
  • October 10, 2006
  • 02:13 AM

Why is an X linked recessive gene more likely to exert effects on males than on females??
A)Is it because males only have one X chromosome? or
B)Genes on the X chromosome are sex-linked?

Color blindness...
A man with normal color vision and a woman whose father was colored blind have children.
Will all children have normal vision or will some percentage of male or female children be color blind??

thanks for any help


Reply Flag this Discussion

1 Replies:

  • hi. usually (from what ive studied) its becuse of the 2x being stronger than 1x.my family has fragile x (genetic disorder). the girls with it are mostly normal to moderately affeccted, the boys are retarded, autistic and severely disabled. with us- they said that the x chromosome has an impact on specific nutrients needed for proper brain functioning. the boys only have one x and it doesnt work- so the brain doesnt get what it needs. because the girls have 2 x's, the good one can "rule out" the bad one or at minimum- provide more than it could with only a single bad x. The mutation is only on the X chromosome- not the Y, so it is sex-linked, as the man can only give one or the other, Y for a boy or X for a girl. If the man has fragile x- his daughters will have it (they got his X) his boys will not (Y) If a woman has fragile x, she can give a child a good X or a bad X. 50/50 chance. so she can give it to both a son or a daughter. mom always gives 1 X----- dad has X or Ychild is either XX=girl or XY boy hope this helps. (interesting at least)
    kamsae 88 Replies
    • January 30, 2007
    • 05:39 AM
    • 0
    Flag this Response
Thanks! A moderator will review your post and it will be live within the next 24 hours.

Signs of a Psoriasis Flare

Know the five types of psoriasis and how to spot flares.

How Diabetes Medications Affect Your Appetite

Newer diabetes treatments can suppress appetite and aid weight loss.

What to Do For Dry Mouth

Try these tips to get your salivary glands back into action.

The Painkiller – Constipation Connection

Constipation is a common side effect of opioid and narcotic pain medicines.

9 Signs of Sensitive Skin

Is it sensitive skin or something else?