genomic imprinting
the covering of a gene or several linked genes by methyl groups, which prevents expression and affects the phenotype depending on which parent transmits an allele
hemizygous
seeds that had half were many X-linked genes as the other: a human male is hemizygous
heterogametic
the sex with two different sex chromosomes; a human male
homogametic
the sex with two of the same sex chromosomes; a human female
manifesting heterozygote
a carrier of an X-linked recessive trait who expresses the phenotype because the normal allele is inactivated in some tissues
sex ratio
number of males divided by number of females multiplied by 1,000, for people of a certain age in a population
sex-influenced trait
phenotype caused when an allele is recessive in one sex but dominant in the other
sex-limited trait
a trait that affects a structure or function present in only one sex
transcription factor
transcription factor
a protein that activates the transcription of certain genes
X Inactivation
a mechanism that turns off most of the genes on one X chromosome in ray cell of a female mammal, occurring early in embryonic development
x-linked
genes on an X chromosome
y-linked
genes on a y chromosome
hermaphroditism
people thats genetic chromosomal sex and physical structures are no consistent with one gender
intersex
internal structure inconsistent sith external structure
pseudohermaphroditism
female and male structure at diffeeent life stages
congenital adrenal hyperplasia
enzyme block causing testosterone to accumulate
y links are
rare
x linked traits male
no backup copy causing expression
x linked traits female
autosomal traits
x linked recessive inheritance
unaffected carrier moms with affected sons
colorblindness
x linked dominant inheritance
can be lethal to men
incontinentia pigmento
what resets imprints
meiosis or birth
imprinting diseases
prader-willi
angelman syndrome
diabetes melitus
autism
alzheimer disease
schizophrenia
male-male attraction
