Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chapter 16-Biology
| Question | Answer |
|---|---|
| What didnt Darwin know? | 1)How herdity worked and 2)How variation arose |
| What is population? | A group of individuals of the same speciaes that interbreed. |
| What is a gene pool? | All the genes, including all the different alleles, that are present in a population. |
| What is Relative Allele Frequency? | The number of times an allele occurs in the gene pool comared with the total number of alleles for the gene. |
| What level does Natural Selection occur on? | The individual level. |
| What level does Evolution occur on? | The population level. |
| What are the two main sources of genetic variation? | 1)Mutations and 2)Genetic Shuffling that results from sexual reproduction. |
| What is a mutation? | Any change in a sequence of DNA. |
| What do many,but not all, mutations result in? | A change in an organisms fitness. |
| What is gene shuffling? | When each homologous pair moves independently in meiosis crossing over. |
| What is the simplest type of trait? | A single-gene trait. |
| How many alleles does a single gene trait have? | Two. |
| What is polygenic? | Traits controlled by two or more genes. Also called quantitive traits. |
| Populations are typically distributed in a symmetrical bell-shaped curve called a... | Normal Distribution. |
| Change leads to what? | Increased fitness. |
| What is the Hardy-Weinberg Principle? | Allele frequencies will remain constant(no evolution as long as 5 conditions are met. |
| What are the 5 conditions of Genetic Equilibrium? | 1)No mutations 2)Random Mating 3)Gene doesnt affect survival or reproduction. 4)Large population size. 5)No immigration. |
| If all 5 H-W conditions are met....1) If any of the 5 conditions are violated...2) | 1)No evolution 2)Evolution |
| What is microevolution? | Evolution on a small scale within a population. |
| Small scale changes in allele frequencies brought by what? | -Natural Selection -Gene Flow -Genetic Drift |
| What are the mutation rates? | -Lethal -Neutral -Advantageous |
| What are the three different posible selections? | -Directional -Stabilizing -Disruptive |
| What does polymorphism mean? | "Having many forms." |
| What does Bottleneck represent? | A severe reduction in population size. |
| What is the Founder Effect? | Effect of drift when a small number of individuals starts a new population. |
| What is inbreeding? | Nonrandom mating between related individuals. |
| What is gene flow? | The physical flow of alleles into a population. |
| What is Speciation? | The formation of a new species. |
| What does reproductively isolated mean? | When the members of two populations cannot interbreed and produce fertile offspring. |
| What leads to Reproductive Isolation? | -Behavioral -Geographic -Temporal |
Created by:
94chickle
Popular Biology sets