Midterm PSY 235 Flashcards
(147 cards)
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