Chapter 8: Human Development Flashcards
Three common methods used to investigate the effects of aging on psychological processes
Longitudinal
Cross-sectional
Cross-sequential
A method that has the advantage of following the same subject across time but are limited due to the amount of time and money required to complete the study.
Longitudinal
Method that is cheaper, faster and easier to conduct because they gather information from different age groups at one particular period of time, however there may be individual and history differences
Cross-sectional
A combination of longitudinal and cross-sectional techniques and often represent an ideal compromise
Cross-sequential studies
Refers to the influence of everything you inherit genetically from your biological parents
Nature
Refers to the influence of your environment on your development
Nurture
Field of science that studies the interactions of nature, genes and nurture, or the environment
Behavioral genetics
The science of heredity and involves the study of DNA, genes and chromosomes
Genetics
The smallest unit of the three (DNA, genes and chromosomes) and is composed of strands and molecules linked together like a twisted ladder
DNA (deoxyribonucleic acid)
The next largest unit after DNA. These are sections of the ladder containing instructions on how to make a specific protein.
Genes
The biggest unit in the study of genetics. These are long strands of DNA twisted together and wound up in coils
Chromosomes
Chromosomes are found in the _____ of all the cells of your body except for ______ cells
Nucleus
Red blood
Humans have a total of ___ chromosomes.
46
First 22 pairs of the chromosomes are called
Autosomes
The last pair of chromosomes (23rd) is called the
Sex chromosomes
Genes that are more likely to influence the trait
Dominant
Almost all traits are determined by multiple gene pairs. This is called
Polygenic inheritance
Represents the beginning of life
Conception
Occurs when the sperm penetrates the egg or ovum
Fertilization
A single cell with 46 chromosomes (23 from sperm and 23 from the egg)
Zygote
Result from the zygote splitting into two separate masses early in the division process
Monozygotic (or identical) twins
Result from two eggs being fertilized by two separate sperm
Dizygotic (or fraternal) twins
Result from an incomplete separation of the zygotic mass
Conjoined twins
First two weeks of pregnancy after fertilization during which the zygote migrates down to the uterus and attaches to the uterine wall
Germinal period
These begin to develop during the germinal period
Placenta and umbilical cord
Lasts from about 2-8 weeks, after which the embryo is about one inch long with primitive eyes, nose, lips, teeth, arms and legs
Embryonic period
Times in development during which an environmental influence can impact the development of the fetus.
Critical periods
The environmental influences that can negatively impact the development of the fetus
Teratogens
Lasts from the eighth week after conception to the end of the pregnancy
Fetal period
Tremendous growth of the fetus occurs during this period
Fetal period
A baby is considered preterm if it is born before the ___ week of pregnancy
38th
Most miscarriages also called _____ occur in the first ___ months of a pregnancy
Spontaneous abortions
Three