Chapter 3 Vocab Flashcards
threadlike structures made of DNA molecules that contain the genes
Chromosomes
a molecule containing the genetic info. that makes up the chromosomes
DNA
the biochemical units of heredity that make up the chromosomes; segments of DNA
Genes
the genetic transfer of characteristics from parents to offspring
heredity
the complete instructions for making an organism, consisting of all the genetic material in that organisms chromosomes
genome
every external influence, from prenatal nutrition to social support in later life
environment
the interplay that occurs when the effect of one factor depends on another factor
interaction
the study of environmental influences of gene expression that occur without a DNA change
epigenetic
the fertilized egg; it enter a 2 week period of rapid cell division and develops into an embryo
zygote
the developing human organism from about two weeks after fertilization through the second month
embryo
twins who develop from a single fertilized egg that splits in two, creating two genetically identical twins
identical twins
the developing human organism from 9 weeks after birth
fetus
an agent such as a chemical or virus, that can reach the embryo or fetus during the prenatal development and cause harm
teratogen
physical and mental abnormalities in children caused by a pregnant women heavy drinking’s, in severe cases signs include a small, out of proportion head and abnormal facial features
Fetal Alcohol Syndrome
a simple, automatic responses to a sensory stimulus
reflex