Question 1

how is tay-sach's inherited?

Accepted Answer

Autosomal recessive: Both parents must carry a mutation in the hexosaminidase a gene. They would have a one in four risk in each pregnancy of having an affected baby.

Question 2

what are some inherited diseases?

Accepted Answer

Too many to list: There's many. We're you thinking of one specifically to learn about?
Some classic ones we learn about in med school are sickle cell. Disease., cystic fibrosis, huntingtons disease.

Question 3

what are the inherited diseases that could come from women having a child when over 45 years of age?

Accepted Answer

The same as at 20yo: Genetic disorders are just that. They come from the genetic makeup of the donor male of female, whatever their age at conception. There is increased risk of chromosomal (structural) defects as the egg ages. Women are born with eggs in suspended animation in the ovaries. At  menses they begin to mature & release until they're gone.Life's accumulated toxic exposures can lead to abnormal chromosomes.

Question 4

what can cause sudden double lashes (distichiasis?)? it seems to have started about 2 months ago & i don't think it was inherited or s.j.s..

Accepted Answer

Blepharitis: Chronic blepharitis can cause it. But usually inherited.  Rarely a lid growth can cause it.

Question 5

how is cf inherited?

Accepted Answer

From both parents: CF is an autosomal recessive disorder meaning the infant must inherit a mutated or abnormal copy of the CF gene from both the mother and the father.  If both parents are carriers of a CF mutation, the odds of the infant having CF are 1 out of 4 or 25% for every pregnancy.

Question 6

is lymphoma inherited?

Accepted Answer

Rarely: There is a very small risk of hereditary lymphoma. First degree relatives of patients with myeloma, lymphoma or cll carry a slightly higher chance of getting these diseases.

Question 7

is narcolepsy inherited?

Accepted Answer

Yes: Up to 10% of narcolepsy patients have family members with the illness.  Twins have an even higher chance of both having the illness.

Question 8

how is tourette's inherited?

Accepted Answer

Multifactorial: Although clearly a genetic disorder, the mode of inheritence for tourette's is complex, involving multiple defective genes, and perhaps even an interplay of genetic and environmental factors. There is also clearly a genetic association between the triad of tourette's, ocd, and adhd, and i generally screen patients i diagnose with tourette's for concurrent adhd and/or ocd.

Question 9

how is hemophilia inherited?

Accepted Answer

Hemo."A" is X-linked: Hemophilia "a" is a hereditary bleeding disorder where there is a deficiency in clotting factor viii (factor viii is needed for blood clotting). It is inherited on the x-chromosome (sex-linked). Men only have 1 "x", so if their "x" is mutated, they will have the disease. Women have 2 "x's", so they can have 1 mutated "x" and 1 normal "x", and be a carrier of the disease, with mild or no symptoms.

Question 10

how is thalassemia inherited?

Accepted Answer

From Mom and/or Dad: Alpha thalassemia is caused by a mutation in one or more of the 4 genes that code for (holds the dna for) Alpha globulin, which is needed to make hemoglobin for new red blood cells. Beta thalassemia is caused by a mutation in one or both of the 2 beta globulin genes. Mom and/or dad can carry the mutations. A child can inherit a mutation from mom, from dad, or from both mom and dad.

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How is tay-sach's inherited?

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What are the inherited diseases that could come from women having a child when over 45 years of age?

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What can cause sudden double lashes (distichiasis?)? it seems to have started about 2 months ago & i don't think it was inherited or s.j.s..

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How is cf inherited?

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Is lymphoma inherited?

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How is hemophilia inherited?

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