Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
37 Cards in this Set
- Front
- Back
|
define crossing over
|
exchange of genes between homologous chromosomes and producing new combinations of genes
|
|
|
Walter sutton
|
genes have places on chromosomes
|
|
|
Linked genes
linkage groups |
linked genes dont undergo indp. assort.
linkage groups contain linked genese but undergo indp assort. |
|
|
define polyploidy
|
condition which organism has extra set of chromosome, fatal in animals
|
|
|
gene mutation
|
any chemical molecule that affects DNA
|
|
|
point mutation
|
affect only a single nucleotide
|
|
|
Multiple alleles
|
3 or more alleles of the same gene that code for a single trait like ABO and Rh
|
|
|
polygenic traits
|
human traits controlled by a number of genes suck as height, weight, skin color
|
|
|
Turner syndrome
|
female, failure to develop sex organs
|
|
|
klinefelter syndrome
|
male, cannot have children
|
|
|
amniocentesis
chorionic villus biopsy |
amnio- removal of fluid from sac surrounding embryo
CVB- removal of embryonic cell sample |
|
|
Down syndrome
|
extra copy of chromosome
|
|
|
Fitness
|
combination of physical traits and behaviors that helps organisms survive and reproduce
|
|
|
common descent
|
species descended form 1 common ancestor
|
|
|
adaptation
|
ORGANISM BECOMES SUITED TO ENVIRONMENT
|
|
|
HUTTON
|
proposed rocks mountains valleys been changed by heat cold, weather
|
|
|
Lyell
|
agreed earth changed slowly over time
|
|
|
relative dating
|
technique used to determine age or fossil in diff layers of rock
|
|
|
absolute dating
|
name ofr radioactive dating since its so accurate
|
|
|
how is earths history divided?
|
into eras, eras into periods, periods into epochs
|
|
|
sedimentary rock
|
particles broken from rocks when exposed to heat rain, particles turn into silt clay sand and settle on bottom of rivers
|
|
|
what do fossil records show
|
change followed change on earth
|
|
|
homologous structures
|
structures that develop from same body parts
|
|
|
Vestigial organs
|
serve no useful purpose
|
|
|
Lamarack
|
recognized living things changed over time
|
|
|
lamarck thought . . that organs could increase in size or shape depending on organisms needs
|
true he thought that but it was wrong
|
|
|
lamarack thought that if u do not use a limb, it would atrophy. also thought things aquired in life are passed on such as long arms
|
true. . but he was wrong
|
|
|
artificial selection
|
allowed only best organisms to produce off spring
|
|
|
who did the moth experiment
|
kettlewell
|
|
|
gene pool
|
members of a population who share common group of genes
|
|
|
niche
|
combo of an organisms "profession" and living place which no 2 species can occupy at the same time
|
|
|
reproductive isolation
|
no interbreeding
|
|
|
adaptive radiation/ divergent evolution
|
# of diff species move away from commmon ancestor
|
|
|
convergent evolution
|
different species similar in appearance and behavior
|
|
|
analogous structures
|
structuures similar in appearance and function but different internal structures
|
|
|
gradualism
|
theroy of evolutionary change slowly
|
|
|
equilibrium
|
organismn didnt change very much
|
