Bio Final 3
Terms
undefined, object
copy deck
- 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