sex linked traits and pedigrees

sex linked gene

a gene located on either the X or the Y chromosome

Y linked genes

genes specifically found on the Y chromosome

X linked genes

genes found on the chromosome

fathers can pass X linked alleles to all of their ____________ but none of their ________-

daughter

sons

mothers can pass X-linked alleles to ____ daughters and sons

both

females will only express trait if they are ____________

homozygous

because males only have one X chromosome, they will express the trait if they inherit it from their _______

mother

hemizygous

one copy of gene or chromosome segment instead of the usual two

definition of Duchenne muscular dystrophy

progressive weakening of the muscles

hemophilia

inability to properly clot blood

color blindness

inability to correctly see colors

the inactive X in each cell of a female condenses into a

Barr Body

many human traits follow ___________ patterns

mendelian

pedigrees are

visualizations of family trees that show inheritance patterns

horizontal line

male - female pair that had children

vertical line

connects to children

autosomal dominant

trait that is expressed by a dominant allele on an autosome

autosomal recessive

recessive alleles on an autosome

X linked dominant

dominant alleles on X chromosomes

X linked recessive

recessive alleles on X chromosome

Y linked

alleles expressed on Y chromosome