sex linked traits

Genes on the Y chromosome

haha few scenes other than SRY
sex determining region
regulator for maleness
turns on gene production for male hormones

X chromosome

contain traits other than sex determination

sex linked traits are found where?

sex chromosomes (usually x)

where are sex linked traits never found

on autosomal chromosomes

why are most sex linked traits on the X chrom

it's bigger with more genes

X inactivation

one of two X chromosomes is randomly inactivated and remains coiled as a Barr body

Patchwork trait in terms of genetics mean

mosaic pattern caused by each cell having different X that are turned on

who are more at risk for inheriting sex disorders

males

Why are males more often affected by sex-linked traits than females?

males only have one X chromosome
-they only inherit one so... if the inherited X are affected they'll have the disorder

who can be a carrier

only females

What is a carrier?

a female who is heterozygous
(she carries a dominant and recessive trait— dominant presents)
-her recessive trait can be passed down
-possible bc of X inactivation

X linked dominant genotypes

XDXD, XDXd
XDY

X-linked recessive genotypes

XdXd
XdY

Y linked traits

ONLY in males
rare