x linked inheritance Flashcards
describe x linked inheritance
disorder that involves X and Y chromosomes
what chromosome does x linked inheritance affect
x chromosome
why are y chromosome disorders uncommon
the Y chromosome contains relatively
few genes
describe female chromosomes as it relates to x linked inheritance
Have two X chromosomes; can be homozygous for the disease,
homozygous for normal, or heterozygous
describe male chromosomes as it relates to x linked inheritance
Have one X chromosome; are always hemizygous;
describe how a male can develop x linked disease
if inherits an X recessive
gene, then he will express the disease
why can a male express the x linked disease if they inherit an x recessive gene
no normal allele is present to
counteract the diseased allele
what gender is more affected by x recessive conditions
males
what is the name of the disease that is associated with x-linked dominant
X fragile disease
what is the name of the disease that is associated with x- linked recessive
hemophilia A