Chapter 8 - Life Span Development Flashcards
What is human development?
The scientific study of the changes that occur in people as they age from conception until death.
What is longitudinal design?
Research design in which one participant or group of participants is studied over a long period of time.
What is cross-sectional design?
Research design in which several different age groups of participants are studied at one particular point in time
What is cross-sequential design?
Research design in which participants are first studied by means of a cross-sectional design but also followed and assessed for a period of no more than six years
What is nature and nurture?
Nature: the influence of our inherited characteristics on our personality, physical growth, intellectual growth, and social interactions
Nurture: the influence of the environment on personality, physical growth, intellectual growth, and social interactions
What is genetics?
The science of inherited traits.
What is DNA?
Deoxyribonucleic acid, a special molecule that contains the genetic material of the organism.
What is a gene? What are the kinds of genes?
Section of DNA having the same arrangement of chemical elements
Dominant: referring to a gene that actively controls the expression of a trait
Recessive: referring to a gene that only influences the expression of a trait when paired with an identical gene
What is a chromosome?
A tightly would strand of genetic material, or DNA
What are some chromosome disorders?
Down syndrome, Klinefelter’s syndrome, and Turner’s syndrome
What are some genetic disorders?
PKU, cystic fibrosis, sickle cell anemia, and Tay-Sachs disease.
What is conception?
The moment at which a female becomes pregnant.
What is an ovum?
The female sex cell, or egg
What is fertilization?
The union of the ovum and sperm.
What is a zygote?
A cell resulting from the uniting of the ovum and sperm which divides into many cells, eventually forming a baby.
What are monozygotic twins?
Identical twins; formed when one zygote splits into two separate masses of cells, each of which develops into a separate embryo
What are dizygotic twins?
Often called fraternal twins; occurs when two eggs each get fertilized by two different sperm, resulting in two zygotes in the uterus at the same time.
What is the germinal period?
First two weeks after fertilization, during which the zygote moves down to the uterus and begins to implant in the lining.
What is the embryonic period?
The period from two to eight weeks after fertilization, during which the major organs and structures of the organism develop.
What is a critical period?
Times during which certain environmental influences can have an impact on the development of the infant
What is a teratogen?
Any factor that can cause a birth defect