Quiz 4 Flashcards
helping others despite a cost to ourselves is called __________ behavior
altruistic
strands of heredity material are called ___________
chromosomes
twins that develop from two eggs are called __________________ twins
dizygotic
we call a gene _______ when a single copy is sufficient to produce its effect
dominant
the field of __________________ studies changes in gene expression as a result of environmental influences.
epigenetics
sections of hereditary material that control chemical reactions that direct development are called ______________
genes
an estimate of the variance within a population that is due to heredity is called __________
heritability
twins that develop from a single fertilized egg are called ______________ twins
monozygotic
whereas, we call a gene _______ when two copies of the gene are required
recessive
genes located on the X or Y chromosome are called _____________ genes
sex-linked
whereas genes that occur equally in both sexes but which exert their effects mainly in one or the other are called ____________ genes
sex-limited
changes in single genes are called _______
mutation
after cells have differentiated as neurons or glia, they ________
migrate
the mechanism of fetal alcohol syndrome probably relates to ________
apoptosis
the concept that neurons refine their many connections based on which ones are most successful is known as ___________
neural darwinism
brain cells that are neither neurons nor glia, but which are capable of dividing and then differentiating into neurons or glia, are called ________
stem cells
an evolutionary psychologist would likely be most interested in studying ______________
the altruistic behavior of meerkats
closed head injury results in damage partially because of ________
forces that push the brain against the inside of the skull
which event is the most common cause of a stroke?
ischemia from an obstruction of an artery
what process is occurring when a primitive neuron begins to develop dendrites and an axon?
differentiation
