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What is one difference between single gene trait and a polygenic trait?
Polygenic traits result in more variation because so many more alleles are involved in the process of reproduction.
What 3 types of Selection pressures that affect a population structure?
The 3 types of selection pressure on a population: 1) "Stabilizing selection" = intermediate phenotypes are favored and extremes on both ends are eliminated. 2)"Directional selection" = is a mode of natural selection in which a single phenotype is favored, causing the allele frequency to continuously shift in one direction. 3) "Disruptive selection/ Diversifying selection" = describes changes in population genetics in which extreme values for a trait are favored over intermediate values
How many pairs of genes control skin color?
3-6
What is Mendels's ratio for dominant to recessive traits?
The Ratio is 3:1
How many types of chemical bond exist?
3 Types Exist
How does the range of phenotypes for single gene traits different from the range for polygenic traits?
ABO Single gene trait blood group alleles on humans. That is the variation, not much, and not much recombination. 3! = 6. There is posited to be at least 7 alleles for height, which is a polygenic trait. Hypothetical alleles, SMYDKECV 7! = 5040 different combinations of alleles in height polygenic traits.
How are multiple alleles different from polygenic traits?
Multiple alleles are genes that have more than two alleles. An example of this would be blood types, with ABO as three separate alleles.Polygenic traits are traits whose phenotype rely on alleles from different genes. An example of this would be hair type, which relies on genes from different parts of chromosomes.The main difference is that multiple alleles are genes with 3 or more alleles; polygenic traits do not necessarily have more alleles, but they rely on on multiple genes.
The graphs of the 3 types of selection and label the average and the extremes?
There are three types of selections. The three types of selections include: disruptive selection, natural selection, and directional selection.
What is one difference between single gene trait and a polygenic trait?
Polygenic traits result in more variation because so many more alleles are involved in the process of reproduction.
What are the three key points of the mutation-selection theory?
1). Mutations supply new traits. 2). Organisms produce more offspring than can survive. 3). Selection allows only those with the best traits to survive.
What 3 types of Selection pressures that affect a population structure?
The 3 types of selection pressure on a population: 1) "Stabilizing selection" = intermediate phenotypes are favored and extremes on both ends are eliminated. 2)"Directional selection" = is a mode of natural selection in which a single phenotype is favored, causing the allele frequency to continuously shift in one direction. 3) "Disruptive selection/ Diversifying selection" = describes changes in population genetics in which extreme values for a trait are favored over intermediate values
Summarize the observations and inferences recognized as the backbone of evolution by natural selection?
1. variation-individuals vary in traits within a species. 2. inheritance- oppspring will inherit the traits 3. offspring with the best traits will survive and reproduce, others will die out.
What are the four stages of natural selection for a turtle?
The four stages for a natural selection of a turtle are the same as any other species; 1. Overproduction- more offspring are produced that will survive. 2. Struggle to survive- only the strong survive and those traits are passed to future generations. 3. Genetic Variation- Different turtles have different traits. Those with desirable traits will reproduce. 4. Successful reproduction- Make it to adult hood and reproduce.
What influences natural selection?
Mostly natural selection depends on the environment
What are 3 patterns of inheritance?
complete dominance incomplete dominance co-dominance multiple alleles polygenic inheritance
How many character traits is there on sims 3?
All pets in the sims 3 can have 3 traits and no more.
What are Darwin's four theories of evolution?
Darwin's four theories of evolution are: 1) Variation: individuals within a population have different traits. 2) Inheritance: these traits can be passed on to offspring. 3) Natural Selection: organisms with traits best suited to their environment are more likely to survive and reproduce. 4) Time: evolution occurs over long periods of time through the accumulation of small changes.
