Midterm PSY 235 Flashcards
What is Mitosis
Non sex cells duplicate of the original cell.
How many chromosomes are there
23 pairs
How do dominate genes work
if the alleles are different, the dominant gene will be expressed
What are Alleles
alternate versions of the same gene, which express characteristics. You receive one maternally, and one paternally.
How do recessive genes work
The person must have 2 copies of the recessive gene, for it to be expressed. although you’ll still have the recessive gene even if it is not expressed due to a dominant allele. You will still spread this recessive gene, through conception.
what is Homozygous?
means that you had received two of the same allele
What is heterozygous
When the alleles are different.
What is polygenic inheritance
Is the interaction of a variety of genes to create a larger theme, such as IQ
what is phenotype
is your genetic makeup mixed with the environment, hence why twins are different.
What is Genotype
genetic makeup of a person, both expressed and unexpressed genes
What is Multifactorial transmission
environmental factors modify how genes are expressed. to create complex traits.
what is epigenetics
genes are turned on or off based on environmental factors. also known as epigenesis
what is incomplete dominance
combination of both genes to express a trait. for example, if a person has one sicklecell allele, and one good one. you don’t have sickle-cell, but your cells aren’t perfectly round
what is sex-linked inheritance
because boys have an XY chromosome and girls have an XX chromosome there is different reactions that the mother can give. the mother can give a bad gene to a female but the father will give his good ‘copy’ to her as well, and that gene won’t be expressed. but because boys have one X. it means the mother has a 50/50 chance of giving the bad gene to the boy.
what is behavioral genetics
Quantitative study of heredity and environment influence on behavior.
what does Concordant mean
term describing twins sharing the same traits or disorders
what is Heritability
Statistical estimate on a given population estimating how much was genetic and or environment. expressed by a percentage 0.0 - 1.0. 1.0 means 100% genes are responsible for varying traits. 0 meaning environment
what is reaction range
potential variability in the expression of hereditary traits.
what does the metaphor canalization mean
The much more environmental factors are required to cause a difference. such as a rain storm and canal. the canal will only overflow with an immense amount of rain
what is a Genotype-environmental interaction
Refers to similar environmental factors on genetically different people. for example, one child might develop allergies and another not in the same environment
what is genotype-environment correlation, and name the 3 correlations
the environment often reflects or reinforces genetic differences.
1). Passive correlation: you inherit your parents genes but also their environment
2). reactive, or evocative correlations: parents who do not have that genetic interest will see the child is interested and further pursue it for them, letting them grow.
3). Active correlation: as the child gets older they will select experiences themselves according to their genetics
what is niche-picking
the tendency for after early childhood to seek out environments compatible with their genotype
what are nonshared environmental effects
siblings that live in the same environment but have different environmental effects. such as a parent might react differently to a child with a closer genetic makeup than the other.
what determines temperament and personality
some temperament factors like shyness are genetic but are heavily reinforced by other environmental factors
is schizophrenia genetic or environmental
it’s both, based on studies of monozygotic and dizygotic twins. although its 60-80% heritability range
what is gestation
the period of development between conception and birth
what is gestation age
age of the unborn baby, usually dated by the first day of the expectant mothers last menstrual cycle
How does culture affect beliefs about prenatal development
different cultures react differently to prenatal development, but most prohibit, or encourage different foods from being eaten
what is Cephalocaudal principle
the principle that development proceeds head to tail. upper body develops before lower body
what is the proximodistal principle
development occurs within to without, near the center before the extremities
what is germinal stage
first two weeks of prenatal development, characterized by mitosis, blastocyst formation, and implantation into the uterine wall
what is implantation
when the blastocyst implants into the uterine wall, this implant location, determines placenta placement
what is a blastocyst
while the Ovum is dividing, it travels down the fallopian tube to the uterus, and changes form to a blastocyst, a fluid-filled sphere, which floats freely in the uterus until the 6th day, when it implants itself to the uterine wall.
what does the placenta do
allows oxygen, nourishment, and wastes to pass between mother and embryo
what is the amniotic sac
is a fluid-filled membrane that encases the embryo, protecting it, and giving room to grow.
what is the embryonic stage, and how long does it last
its the second stage of gestation 2-8 weeks. characterized by rapid growth, and development to major systems and organs
what is spontaneous abortions
natural expulsion of the embryo, that could not have survived outside the womb. also called a miscarriage. 80% occur when the mother is not aware they are pregnant
what is the fetal stage, and how long does it last
8 week to birth. The final stage of gestation, is characterized by differentiation in body parts and greatly enlarged body size.
what is a teratogen
is an environmental agent, such as a virus, drug, or radiation. that interferes with normal development
How does stress effect the fetus
moderate stress can have good benefits such as improved neurological development. although heavy stress and causes newborns to have irritable temperaments, emotional negativity, and impulsivity
what are dizygotic twins
are fraternal twins, two separate eggs being released into and sharing the same womb. genetically siblings
what are monozygotic twins
cleaving of one fertile egg, and are genetically identical.
what is the human genome.
complete sequence of genes in the human body
What is human development
scientific process of change, and stability in the human life span
what is life-span development
concept of human development as a lifelong process
what are the domains of development
Physical
Cognitive
Psychosocial
what is a social construction
an invention of a certain culture, which seems obvious inside the culture but really isn’t outside
is childhood a social construction?
yes
what are the 8 periods of human development, and ages, in order
Prenatal/ Conception to birth
Infancy, toddlerhood/ birth-3yr
early childhood/3-6
middle childhood/ 6-11
adolescence/ 11-20
young adult/ 20-40
middle adult/40-65
late adult/65+
what is a nuclear family
two-generational kinship, household, 2 parents and their children
what is an extended family
multigenerational kinship, grandmas, moms, other relatives in one household
what is intersectionality
an analytical framework focused on multiple identities combined to create differences in privilege and discrimination
what is ethnic gloss
overgeneralization the blurs differences
what is normative influences
many people will experience the same event
what is non-normative
unusual events that had a major impact
what are the 7 principles of life-span development
Development is lifelong
development is multidimensional
development is multidirectional
relative influences of biology and culture shift over the lifespan
development involves resource allocations to change
development shows plasticity
development is influenced by historic and cultural context
what does it mean when they say “stage” in research
if the development occurs continually or in stages
what is the mechanistic model in research.
model that views human development as a series of predictable responses to stimuli