chapter 2 Flashcards
1
Q
genotype
A
genetic inheritance
2
Q
phenotype
A
expression of genetic traits in observable characteristics and behaviors
3
Q
epigenetics
A
environmental factors can influence the expression of genetic traits
modification in expression rather then the genetic code itself
prenatal environmental factors affect risk of certain diseases
lifestyle factors influence risk for cancer and Alzheimer’s disease
4
Q
DNA methylation
A
addition of methyl group in DNA
affects trancription/modifies function of gene
5
Q
DNA histone modification
A
histones help package DNA
6
Q
mutation
A
sudden changes and abnormalities in structure of genes
may involve one or many genes
may occur spontaneously or by exposure to environmental toxins
