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11 Cards in this Set
- Front
- Back
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Hemophilias, G6PD, Duchennes Muscular Dystrophy, are examples of what?
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X-linked recessive diseases
Recessive allele carried by the X chromosome, mostly affecting males, never passed from father to son |
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What is X-linked dominant? what is the best example?
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Dominant allele carried by the X chromosome Affecting females twice as often as males
Never passed from father to son Always passed from affected father to daughter Passed from affected mother to half her children FRAGILE X (FMR1 gene) |
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maternal inheritance from a mother to all of her children describes what kind of inheritance pattern?
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Mitochondrial
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what are sex-influenced traits? examples?
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Genetic traits whose phenotype is influenced
by the sex of the individual. Examples: Autism (worse & more common in males) Congenital hip dysplasia (worse in females) Autosomal dominant polycystic kidney disease Idiopathic scoliosis |
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what are Sex-limited traits?
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Traits restricted to one sex, although the genotype can be present in either sex.
Examples: BRCA 1- related breast cancer 5a-reductase deficiency |
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What happens in 5alpha reductase deficiency? (genetics, MvsF)
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Autosomal recessive
Genetic females are normal Genetic males have ambiguous genitalia (5 alpha reductase is responsible for turning testosterone to DHEA) |
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Lyonization leads to what
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Mosiacism in females
ectodermal one of the two copies of the X chromosome present in female mammals is inactivated |
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What is the SRY gene?
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it pretty much determines if you are a man
if you delete the SRY on a male, even if you are XY you will be a female if you HAVE the SRY gene on a female, you will have a XX male |
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What is a TRUE hermanphrodites? how does this occur?
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mixture of ovaries and seminiferous tubules in one individual
due to a FUSION of twins (one that was male, one that was female) resulting in XYXX this differentiates into a Chimeria |
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This cerebral structure has been found to be 2x smaller in homosexual men compared to heterosexual men
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INAH-3
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These cerebral structures have been found to be larger in homosexual men compared to heterosexual people
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SCN (suprachiamastic nucleus)
Anterior Commisure |
