section 2 Flashcards
heritable characteristics
carried in genes
passed on [gen. to gen.]
ex. skin/hair colour or type
non heritable characteristics
caused by environment
learned or acquired
ex. learning a craft or trade (guitar)
discrete characteristics
either or
you have one or the other
ex blood types (A, B, AB, O)
you can have a mix of blood types, you just have that one
continuous characteristics
a range of traits
you can fall anywhere in the range
ex. height (167, 167.5, 168, etc)
nature vs nurture
nature
means biological factors
refers to genetics
nature vs nuture
nurture
refers to life experience or upbringing
– the way, where, and how an organism grows up impacts them
if a genetically athletic person doesn’t train, they won’t reach their full potential
asexual reproduction
what are the different forms?
one parent; offspring identical to the parent
different forms of reproduction
budding, binary fission, spore production, vegetative reproduction
binary fission
splits into 2 identical daughter cells
amoeba, bacteria
budding
parent produces small bud/version of itself
coral bud, hydra
spore production
grows into new organism without uniting/fusing with other cells
ferns, green aglae
vegetative reproduction
reporduction that bypasses the creation of seeds
cuttings, suckers, runners
sexual reproduction
what is a gamete?
2 parents; offspring is mix of them
relies on union of 2 gametes
sex cell
animal sexual reproduction cycle
what are the male and female gametes?
fertilization occures
forms zygote
cell division [cleavage]
multicellular embryo formed
egg (f) and sperm (m) – each contain half the genetic info
plant - sexual reproduction
what are the male and female gametes?
genetic mixing: pollen from one plan fertilizes another plant
pollen (M) and ovules (F) - each contain half the genetic info
