Create an account
deoxyribonucleic acid (DNA)
molecule composed of four nucleotide base that is the biochemical basis of heredity
physical, behavioral and psychological features that result from the interaction between one's genes and the environment
disorder in which individuals show signs of mild anemia when they are deprived of oxygen; occurs in individuals who have one dominant allele for normal blood cells and one recessive sickle-cell allele
the branch of genetics that studies the inheritance of behavioral and psychological traits
when phenotypes are the result of the combined activity of many separate genes
result when a single fertilized egg splits to form two new individuals; also called identical twins
result of the fertilization of two separate eggs by two sperm; also called fraternal twins
a genotype manifested in reaction to the environment where development takes place, so a single genotype can lead to a range of phenotypes
process of deliberately seeking environments that are compatible with one's genetic makeup
nonshared environmental influences
forces within a family that make siblings different from one another
in vitro fertilization
process by which sperm and an egg are mixed in a petri dish to create a zygote, which is then placed in a woman's uterus
effort to improve the human species by letting only people whose characteristics are valued by a society mate and pass along their genes
step in which the zygote burrows into the uterine wall and establishes connections with a woman's blood vessels
small cluster of cells near the center of the zygote that will eventually develop into a baby
structure through which nutrients and wastes are exchanged between the mother and the developing child
outer layer of the embryo that will become the hair, outer layer of skin, and the nervous system
structure containing veins and arteries that connects the developing child to the placenta
period of the fetus
longest period of prenatal development, extending from the 9th until the 38th week after conception
wrinkled surface of the brain that regulates many functions that are distinctly human
age of viability
age at which a fetus can survive because most of its bodily systems function adequately; typically at 7 months after conception
fetal alcohol syndrome (FAS)
disorder affecting babies whose mothers consumed large amounts of alcohol while they were pregnant
prenatal diagnostic technique that bounces sound waves off the fetus to generate an image of the fetus
prenatal diagnostic technique that involves withdrawing a ample of amniotic fluid through the abdomen using a syringe
chorionic villus sampling
prenatal diagnostic technique that involves taking a sample of tissue from the chorion
a person familiar with child birth who is not part of the hospital medical staff but instead provides emotional and physical support throughout labor and delivery
a birth complication in which umbilical blood flow is disrupted and the infant does not receive adequate oxygen
caesarean section (C-section)
surgical removal of infant from the uterus through an incision made in the mother's abdomen
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together