Nature vs nurture Flashcards
what two factors affect phenotypes
environmental factors and epigentics
what is proportionate heritability
a phenotype is not only a result of genetics but also the environment an organism is in
what is epigenetics
the molecular interactions with DNA that modify the expression of genes, the increase or decrease of transcription of genes into proteins
what does gene expression really mean
when the genes information is used by the cell to build a protein
what are the two types of epigenetic modifications
DNA methylation and histone modifcation
what happens when histones are methylated
the DNA is wrapped more tightly which slows down the rate of transcription and therefore gene expression
what are molecular tags
epigenic markers that at as tags which tell the cell to increase or decrease gene transcription
what is methyltransferase
lower transcription - tighter wrapped
what is acetyltransferase
higher transcription - losely wrapped
arre epigenetics heritable
yes somatically heritable, and inheritable in sperm and eggs cells occasionally
