Site specific recombination and transposition.........pdf
Nature vs. Nurture
1.
2.
Heredity is the passing of traits to
offspring (from its parent or ancestors)
Hereditary traits are determined by
specific genes.
Individuals carry two genes for each
trait, one from the mother’s egg and
one from the father’s sperm.
Heredity
4.
Vital in the transmission of physical traits
(height, eye color)
Vital in the transmission of psychological
traits (shyness, leadership,
aggressiveness)
Shown to be one factor involved in
psychological disorders (anxiety,
depression, bipolar disorder, alcoholism)
Why is Heredity
important?
11.
Make a list of 10 traits you share with your
family
Think: Mom, dad, siblings, grandparents,
cousins, aunts, uncles, stepsiblings, half-
siblings, step-parents, etc.
These traits can be physical (hair color),
psychological (shy or outspoken), or even
disorders (depression)
Make a list:
12.
Throughout history people have debated the role
of biology in determining who we are, as people
Nature: what people inherit- biological
groundwork
V.S.
Nurture: environmental factors- what a
person is exposed to in life
The Nature-Nurture Debate
15.
Genes: Basic building blocks of heredity
Traits are determined by pairs of genes,
with one gene in each pair inherited from
each parent
Genes and Chromosomes
16. Genes are found in threadlike structures
called chromosomes, which are composed of
DNA
Most normal human cells contain 46
chromosomes that are organized into 23
pairs.
Researchers have learned that 22 of the 23
pairs of chromosomes are similar in males
and females; except the 23rd pair (which
determines gender)
Chromosomes
18.
When a child is born without 46
chromosomes
Physical and behavioral disorders may
result
Example: A child born with an extra, or
third, chromosome on the 21st pair will be
born with Down syndrome
Chromosomes
19.
Down syndrome is a
genetic condition in
which a person has 47
chromosomes instead of
the usual 46.
