Evolution Power Point
... A. Natural Selection: Charles Darwin 1. All species have such a great potential fertility that their population size would increase exponentially if all individuals born would reproduce successfully 2. Most populations remain stable except for seasonal fluctuations 3. Natural Resources are limited ...
... A. Natural Selection: Charles Darwin 1. All species have such a great potential fertility that their population size would increase exponentially if all individuals born would reproduce successfully 2. Most populations remain stable except for seasonal fluctuations 3. Natural Resources are limited ...
Origin of Species - Santa Susana High School
... population. Mechanisms include chromosomal changes and nonrandom mating that changes gene flow within a population. – polyploidy having more than 1 set of chromosomes • autopolyploildy - more than 2 sets of chromosomes from a single species. More common in plants. • allopolyploidy - two different sp ...
... population. Mechanisms include chromosomal changes and nonrandom mating that changes gene flow within a population. – polyploidy having more than 1 set of chromosomes • autopolyploildy - more than 2 sets of chromosomes from a single species. More common in plants. • allopolyploidy - two different sp ...
Mutations Can Change the Meaning of Genes
... How Mutations Affect Genes Mutation: any change in the nucleotide sequence of DNA Types of Mutations: Base substitutions: replacement of one nucleotide w/ another. May or may not affect protein Base deletions & Base insertions: May be more harmful b/c all subsequent codons will be altered ...
... How Mutations Affect Genes Mutation: any change in the nucleotide sequence of DNA Types of Mutations: Base substitutions: replacement of one nucleotide w/ another. May or may not affect protein Base deletions & Base insertions: May be more harmful b/c all subsequent codons will be altered ...
Population Genetics
... – Gene mutations provide new alleles, and therefore are the ultimate source of variation. a. A gene mutation is an alteration in the DNA nucleotide sequence of an allele. b. Mutations may not immediately affect the phenotype. c. Mutations can be beneficial, neutral, or harmful; a seemingly harmful m ...
... – Gene mutations provide new alleles, and therefore are the ultimate source of variation. a. A gene mutation is an alteration in the DNA nucleotide sequence of an allele. b. Mutations may not immediately affect the phenotype. c. Mutations can be beneficial, neutral, or harmful; a seemingly harmful m ...
Genetic Mutations
... It is caused by a number of different point mutations in the CFTR gene, which codes for a transmembrane protein that acts as an ion pump. ...
... It is caused by a number of different point mutations in the CFTR gene, which codes for a transmembrane protein that acts as an ion pump. ...
Lecture 19 Evolution of Senescence
... signaling pathway that is known to influence metabolism and lifespan in model organisms. A recent study described 3 SNPs in the FOXO3A gene that were statistically significantly associated with longevity in a discovery sample of long-lived men of Japanese ancestry [Willcox et al. (2008) Proc Natl Ac ...
... signaling pathway that is known to influence metabolism and lifespan in model organisms. A recent study described 3 SNPs in the FOXO3A gene that were statistically significantly associated with longevity in a discovery sample of long-lived men of Japanese ancestry [Willcox et al. (2008) Proc Natl Ac ...
Smurfs, Trolls & Elves
... • Elvin ears and facial structure/short stature • Often lack of ability to read or write clearly • Frequently, musical, story-telling and social ability enhanced ...
... • Elvin ears and facial structure/short stature • Often lack of ability to read or write clearly • Frequently, musical, story-telling and social ability enhanced ...
Gene Flow (migration)
... population of Philadelphia, Pennsylvania was founded in the 1700’s by only a few families. The current population of Amish in the region has an unusually high rate of polydactylism (the presence of a 6th finger or toe). - E.g. 2: The Bottleneck Effect – changes in gene distribution that result from ...
... population of Philadelphia, Pennsylvania was founded in the 1700’s by only a few families. The current population of Amish in the region has an unusually high rate of polydactylism (the presence of a 6th finger or toe). - E.g. 2: The Bottleneck Effect – changes in gene distribution that result from ...
DNA!
... • DNA is identical in all of your cells. • BUT … sometimes, random changes can occur … MUTATIONS • A mutation is a random change in a cell’s genetic information ...
... • DNA is identical in all of your cells. • BUT … sometimes, random changes can occur … MUTATIONS • A mutation is a random change in a cell’s genetic information ...
Biology I - WEB . WHRSD . ORG
... 3.5 Describe how Mendel’s laws of segregation and independent assortment can be observed through patterns of inheritance (e.g., dihybrid crosses). 3.6 Use a Punnett Square to determine the probabilities for genotype and phenotype combinations in monohybrid crosses. 5. Evolution and Biodiversity Cent ...
... 3.5 Describe how Mendel’s laws of segregation and independent assortment can be observed through patterns of inheritance (e.g., dihybrid crosses). 3.6 Use a Punnett Square to determine the probabilities for genotype and phenotype combinations in monohybrid crosses. 5. Evolution and Biodiversity Cent ...
Genetic variation
... During the meoitic division that occurs when gametes are made, homologous chromosomes exchange genes and then separate. The chromosomes that are seperated therefore have different DNA to the original parent’s. Variation has occurred here for the first time. The second time when variation occurs is w ...
... During the meoitic division that occurs when gametes are made, homologous chromosomes exchange genes and then separate. The chromosomes that are seperated therefore have different DNA to the original parent’s. Variation has occurred here for the first time. The second time when variation occurs is w ...
Genetic Disorders - Michigan Department of Education Technology
... B4.2A Show that when mutations occur in sex cells, they can be passed on to offspring (inherited mutations), but if they occur in other cells, they can be passed on to descendant cells only (noninherited mutations). B4.2D Predict the consequences that changes in the DNA composition of particular ge ...
... B4.2A Show that when mutations occur in sex cells, they can be passed on to offspring (inherited mutations), but if they occur in other cells, they can be passed on to descendant cells only (noninherited mutations). B4.2D Predict the consequences that changes in the DNA composition of particular ge ...
Lecture Chpt. 24 Evolutn Show 4 Variatn
... luck. Selection cannot increase the frequency of the green gene, because it’s not there for selection to act on. Selection can only act on what variation is already in a population; it cannot create variation. ...
... luck. Selection cannot increase the frequency of the green gene, because it’s not there for selection to act on. Selection can only act on what variation is already in a population; it cannot create variation. ...
C-13 Part II Non-Mendelian inheritance
... Continuous variation • When multiple genes act together to produce a physical (phenotypic) character, a gradation or range of differences occur. • Examples: height, weight in humans • Referred to as polygenic traits ...
... Continuous variation • When multiple genes act together to produce a physical (phenotypic) character, a gradation or range of differences occur. • Examples: height, weight in humans • Referred to as polygenic traits ...
Two main sources of genetic variation
... • Selection that splits a population into 2 groups. • Removes individuals with average traits, but keeps those with more extreme traits. ...
... • Selection that splits a population into 2 groups. • Removes individuals with average traits, but keeps those with more extreme traits. ...
Natural Selection does not produce perfection, just *good
... squirrels evolve new breeding times in response to climate change, a fish species evolve resistance to toxins dumped into the Hudson River, and a host of microbes evolve resistance to new drugs we've developed ...
... squirrels evolve new breeding times in response to climate change, a fish species evolve resistance to toxins dumped into the Hudson River, and a host of microbes evolve resistance to new drugs we've developed ...
8th Grade Science
... Species and the Environment How come so many species came to exist on Earth? Charles Darwin and Alfred R Wallace separately concluded that different, long term, environmental influences on populations produced the variety of species. What does this mean? ...
... Species and the Environment How come so many species came to exist on Earth? Charles Darwin and Alfred R Wallace separately concluded that different, long term, environmental influences on populations produced the variety of species. What does this mean? ...
separate PDF document
... gene controls the development of a specific characteristic of the living organism (such as eye color). Each gene has its own position (or "locus") on its chromosome. Some genes have one or more variants that together comprise a group, one variant of which can occur at the gene's locus. An allele ref ...
... gene controls the development of a specific characteristic of the living organism (such as eye color). Each gene has its own position (or "locus") on its chromosome. Some genes have one or more variants that together comprise a group, one variant of which can occur at the gene's locus. An allele ref ...
Goal 3 Guided Worksheet
... c. Fossil evidence informs our understanding of the evolution of species and what can be inferred from this evidence. i. _________________________ (molecular) similarities tell us what organisms have similar ancestors. ii. ________________________structures (homologies) tell us what organisms have s ...
... c. Fossil evidence informs our understanding of the evolution of species and what can be inferred from this evidence. i. _________________________ (molecular) similarities tell us what organisms have similar ancestors. ii. ________________________structures (homologies) tell us what organisms have s ...
