Hardy Weinburg
Isolations
selection
Other
Fun!
100
400 ind. p^2 = .49, 2pq=.42, and q^2=.09 how many will be heterozygous
400x.42= 168
so 168
100
A horse and donkey can make a mule but the mules are sterile(can't reproduce) which barrier is this?
Postzygotic isolation
100
fishes with big fins and small fins swim less effectively than medium size fin, which selection will occur
Selection
100
The same lizard species live in two different areas and a new mountain range separates the two and they eventually become re productively isolated. Which occured?
Allopatric speciation
100
One species of frog lives and breeds along the edges of major rivers, while a closely related species stays high up in the rainforest canopy. Which isolation barrier is this?
habitat isolation
200
1000 flowers, 360 are white(ww), what frequency is the dominant allele(W)?
1. rec. allele frequency: 0.36
2. sqrt of 0.36 equals 0.60
3. 1-0.60= 0.40
Answer: 0.40
200
One species of lions only breeds in the spring while the other only breeds in the fall. Which reproductive barrier prevents them from mating together?
Temporal
200
After predators that prefer small animals enters an env. larger animals survive and reproduce and the avg body size inc. WHich selection occured
200
Compare protein sequence of genes across 3 different species according to the number of amino acid differences as followed, which shows the greatest difference to spongebob?
Butterflies vs. apes: 27 differences
Butterflies vs. humans: 15 differences
Butterflies vs. ladybugs: 7 differences
Apes
200
If species A and B branch from same node while C branches from older node, which species share recent common ancestry?
A and B
300
p=0.7 and q=0.3
How many individuals are gonna be heterozygous?
2pq= 2(0.7)(0.3) = 0.42
answer 0.42
300
Female hummingbirds only respond to mating songs of their own species? which barrier is this?
behavioral isolation
300
Black and white spiders can camouflage better than grey spiders, which selection occurs?
300
an event kills 75% of an islands squirrel population. The survivers carry fewer copies of a particular allele which then carries on to the next generation.What process most directly explains the allele frequency change?
Genetic drift
300
How is bottleneck and founder effect similar?
they are genetic drifts
400
p=0.8 and q=0.2 what is percent of homozygous dominant?
0.64
400
Dragonflies have special claspers to hold females during mating, if the dragonfly tries to mate with diff species it cannot hold her correctly preventing the sperm transfer, Which barrier is this?
mechanical
400
Birds eat red fish more than blue fish as they are easier to see. Over generations blue fish are more common, why?
natural selection
400
A group of birds living in the same trees use different trees over generations the preference of trees and mating behavior makes a decrease in the interbreeding with the og. group. Which results in two species, what process best describes what occured?
Sympatric speciation
400
Birds reach a new island chain over generations they evolve into diff species each adapted to diff food sources which evolutionary process occured?
Adaptive radiation because they turn into multiple species adapted to multiple niches
500
2000 plants, 4% are rr how many heterozygous?
q^2=.04
q=0.2 and p=0.8
2pq=2(.2)(.8)=.32
2000x.32=640
500
Two plant species release pollen. One of them cannot get their pollen to bind with the others reproductive area, preventing fertilization. Which barrier is this?
gametic
500
What is the order of natural selection influence
1.Change happens
2. Species with poor adatation die off
3. genes change
4.well adapted survive and reproduce
500
Humans arms and cats front legs share similar structure yet humans use their arm to grab stuff and cats use theirs to walk, what evolutionary factor shows here?
Homologous structure?
500
Phylogenetic tree shows species 5,6,7,8. Species 5 and 6 share most common ancestor, 7 branches off earlier than the 5 and 6 split and 8 branched off the earliest. which share more recent common ancestor?
5 and 6