Developmental Psychology, Module 2
Terms in this set (89)
Gestational period
Truly 38 weeks of development (medical
practitioners count it as 40 weeks, including the 2 weeks from ovulation to last period)
Humans begin as a...
Zygote (single cell, formed by fusion of sperm and egg)
...
Psych 140
Developmental Psychology, Module 2
Terms in this set (89)
Truly 38 weeks of development (medical
Gestational period practitioners count it as 40 weeks, including the 2
weeks from ovulation to last period)
Zygote (single cell, formed by fusion of sperm and
Humans begin as a...
egg)
Humans have more than 25,000
______________ genes
Genetically identical, forms when zygote splits into
Monozygotic twins
two in the first few weeks
Genetically just like siblings, forms when two
Dizygotic twins
separate ova are fertilized by two separate
sperm
Why are multiple births more Fertility drugs/artificial medical methods used today
common today?
Older women are more likely to have multiple
Factors that impact multiple
births, race impacts likelihood of multiple
birth likelihood
births (caucasian - 1 in 86, African American - 1
in 70)
The one trait that is expressed when two competing
Dominant trait
traits are present
, A trait within an organism that is present but is not
Recessive trait expressed
The underlying combination of genetic material
Genotype present (but not outwardly visible) in an
organism
Phenotype An observable trait; the trait that is actually seen
Alleles Genes for traits that may take alternate forms
Homozygous Inheriting similar genes for a given trait from parents
Inheriting different forms of a gene for a given
Heterozygous trait from parents
Inheritance in which a combination of multiple
gene Polygenic inheritance pairs is responsible for the production of a
particular trait
When was the human genome 2001
mapped?
The study of effects of heredity on behavior - helps
uncover how behavioral difficulties may have
Behavioral genetics genetic basis (ex: Schizophrenia, Alzheimer's,
addictions)
Some disorders are _____________, Genetic/inherited, damaged genes/issues in
some are caused by: pregnancy
Genes that are considered recessive and located
X-linked genes only on the X chromosome
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