discussions Flashcards
DDT-R Locus
Resistance is dominant
Cyp6g1 over-expressed
Cyp6g1 transcription #1 study
Goal: determine correlation strength between Cyp6g1 over-transcription level and DDT-R
DDT-R cross resistance
Goal: see what other insecticides DDT-R confers resistance for
Using 4 resistant strains and 2 reference strains
study #3- population genetics
Goal is to examine the evolutionary relationships & nucleotide sequences between DDT-R alleles
Study #4; Cyp6g1 insertion
To see if Cyp6g1 over-transcription is (necessary and) sufficient for DDT resistance
Sexual selection
Type of natural selection that prioritizes mating success; occurs on a single sex
Honest indicator
Signal/display that cannot be faked- COSTLY
Common garden experiment
Determine if male frog call duration indicates heritable genetic quality; compare maternal half-siblings performance; each female crossed with two males that had DIFFERENT call durations under SAME SOCIAL ENVIRONMENT
Artificial fertilization
Egg-stripping
Frogs show evolution by sexual selection?
Variation
- male call duration
- larval performance parameters
Heritable trait
- half sibs differ in larval performance according to PATERNITY
Differential fitness
- larval survival
- difference in matings/offsrping
Checklist for natural selection
- Variation (phenotype)
- heritable trait (genotype)
- Differential fitness
Indirect benefits
Male signals indicate genetic benefits to offspring
Direct benefits
Male signals indicate NON GENETIC benefits provided directly to the female that increase her fitness (access to high quality breeding territory)
Sexy Sons (Fisherian/Runaway)
Female preferences are arbitrary (no correlation between male signals and male’s quality or his offspring viability)
Phenotypic plasticity
Same GENOTYPE is responsible for numerous PHENOTYPES
Driver
Allele at locus exhibiting Meiotic drive
