CH. 9 Flashcards
nature-nurture issue
the issue of the degree to which environment and heredity influence behavior
developmental psychology
the branch of psychology that studies patterns of growth and change that occur throughout life
Who/what developmental psychology influenced by?
behavioral geneticists and the theories of evolutionary psychologists
identical twins
twins who are genetically identical
What is one approach that developmental psychologists use?
observe animals with identical genetic backgrounds in varied environments
cross-sectional research
a research method that compares people of different ages at the same point in time to assess difference among groups of people
longitudinal research
a research method that investigates behavior as participants age to assess changes in behavior over time
chromosomes
rod-shaped structures that contain all basic hereditary information
genes
parts of the chromosomes through which genetic information is transmitted
What is an XX combination?
female
What is an XY combination?
male
What do genes do?
- control the development of systems of the human species–heart, circulatory system, brain, lungs, and so forth
- shape the characteristics that make each human unique
- determines the child’s sex by a particular combination
What was the 2001 Human Genome Project able to do?
map the specific location and sequence of every human gene
What effect did the Human Genome Project have on health care?
- scientists could now identify the particular genes responsible for genetically caused disorders
- risk factors in children can be identified
- new treatments for physical and psychological disorders have been made possible
zygote
a new cell formed by the union of an egg and sperm
germinal period
the first two weeks after the union of an egg and sperm (zygote)
embryonic period
week 2 through week 8 after the union of an egg and sperm (zygote)
embryo
a developed zygote that has a heart, a brain, and other organs that are clearly recognizable, despite being at a primitive stage of development
fetal period
week 8 after the union of an egg and sperm until birth
fetus
a developing individual from 8 weeks after conception until birth
age of viability
the point at which a fetus can survive if born prematurely–at about prenatal age 22 weeks
sensitive period
time when organisms are susceptible to certain kinds of stimuli
What does prenatal development involve?
passing through several sensitive periods
At then end of the normal 38 weeks of pregnancy, how much does the fetus weigh?
7 pounds