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... result from the appearance of new ecological niches • For example, the North American maggot fly can live on native hawthorn trees as well as more ...
... result from the appearance of new ecological niches • For example, the North American maggot fly can live on native hawthorn trees as well as more ...
First complete account of the genus Lachenalia published
... The information in this book arises from a combination of a great deal of searching in the field, horticultural efforts to grow and propagate specimens, and scientific endeavour. As a horticulturalist, Duncan has gained enormous insights from working with this genus for over three decades. He has co ...
... The information in this book arises from a combination of a great deal of searching in the field, horticultural efforts to grow and propagate specimens, and scientific endeavour. As a horticulturalist, Duncan has gained enormous insights from working with this genus for over three decades. He has co ...
Mechanisms of Evolution
... evolves into an array of species to fit diverse habitats. This is a type of divergent evolution where species diverge or become less and less alike as they adapt to different environments. Convergent Evolution – Unrelated species occupy similar environments in different parts of the world. Similar ...
... evolves into an array of species to fit diverse habitats. This is a type of divergent evolution where species diverge or become less and less alike as they adapt to different environments. Convergent Evolution – Unrelated species occupy similar environments in different parts of the world. Similar ...
EVOLUTION Evolution - changes in allele frequency in populations
... they will still share many of the same genes because they descended from the same ancestors. ...
... they will still share many of the same genes because they descended from the same ancestors. ...
Vocabulary
... exclusively Deoxyribonucleic Acid (DNA). Some viruses use (Ribonucleic Acid) RNA as their genetic material. Inbreeding: The continued breeding of closely related individuals so as to preserve desirable traits in a stock. Line breeding: the interbreeding of individuals within a particular line of des ...
... exclusively Deoxyribonucleic Acid (DNA). Some viruses use (Ribonucleic Acid) RNA as their genetic material. Inbreeding: The continued breeding of closely related individuals so as to preserve desirable traits in a stock. Line breeding: the interbreeding of individuals within a particular line of des ...
Population genetics is the study of evolution from a genetic
... 18. Females tend to choose the males they mate with based on certain traits. This is referred to as _____________________________. In order to leave offspring, a male must be selected by the female. 19. The process of species formation, ___________________, results in many related populations of org ...
... 18. Females tend to choose the males they mate with based on certain traits. This is referred to as _____________________________. In order to leave offspring, a male must be selected by the female. 19. The process of species formation, ___________________, results in many related populations of org ...
The Extinction Vortex
... • Usually the color distribution in your new, very small population, is very different than it was in the whole population, & some colors are missing • This phenomenon of random change in gene frequency & loss of diversity is called “random genetic drift” ...
... • Usually the color distribution in your new, very small population, is very different than it was in the whole population, & some colors are missing • This phenomenon of random change in gene frequency & loss of diversity is called “random genetic drift” ...
File - BIOLOGY and HONORS PHYSIOLOGY Mr. Wylam
... The “____________” refers to the _______________________ (within a species) for any given trait in a ____________________________-. _______________________ is the natural shifting of allele frequency within a population over time. In the _______________________________________________, genetic drift ...
... The “____________” refers to the _______________________ (within a species) for any given trait in a ____________________________-. _______________________ is the natural shifting of allele frequency within a population over time. In the _______________________________________________, genetic drift ...
Evolution
... • Mules are the reproductive result of a horse and a donkey breeding • Mules are sterile • Therefore, a horse and a donkey must represent ...
... • Mules are the reproductive result of a horse and a donkey breeding • Mules are sterile • Therefore, a horse and a donkey must represent ...
Genetics Exam 5
... _____ Polyploid plants found in nature usually have even numbers of chromosomes because organisms having odd numbers A. exhibit altered mitosis B. are unable to asexually reproduce C. exhibit altered growth D. have low fertility E. are not viable _____ Pollen from one species germinates on the stigm ...
... _____ Polyploid plants found in nature usually have even numbers of chromosomes because organisms having odd numbers A. exhibit altered mitosis B. are unable to asexually reproduce C. exhibit altered growth D. have low fertility E. are not viable _____ Pollen from one species germinates on the stigm ...
Chapter 19-Population Genetics and Speciation
... -Darwin’s finches: 13 on Galapagos, 14th species on Cocos Islands differ in food, size/shape of beaks -however, species containing large #s of indiv and covering wide areas of a continent may remain unaltered for millions of yrs b/c they are subject to gene flow and stabilizing selection -genetic ...
... -Darwin’s finches: 13 on Galapagos, 14th species on Cocos Islands differ in food, size/shape of beaks -however, species containing large #s of indiv and covering wide areas of a continent may remain unaltered for millions of yrs b/c they are subject to gene flow and stabilizing selection -genetic ...
File
... flowers on same plant) Peas can crossfertilize (pollinate flowers on a different plant) ...
... flowers on same plant) Peas can crossfertilize (pollinate flowers on a different plant) ...
Ch. 16 The Evolution of Populations and Speciation
... A. Stabilizing Selection- individuals w/ the average form of a trait have the highest fitness. – the average represents the optimum for most traits, the extreme forms of most traits relinquish lower fitness for those individuals that have them. » Selection against the extremes reduces # of organisms ...
... A. Stabilizing Selection- individuals w/ the average form of a trait have the highest fitness. – the average represents the optimum for most traits, the extreme forms of most traits relinquish lower fitness for those individuals that have them. » Selection against the extremes reduces # of organisms ...
1 Populations are the units of evolution The gene pool of a
... •a collision between the earth and a gigantic asteroid rich in iridium •the force of thousands of atomic bombs •A dust cloud high into the sky. •This cloud would block out nearly all of the sunlight, creating a long, cold, unnatural winter, drastically changing the climate for years to come. •The fe ...
... •a collision between the earth and a gigantic asteroid rich in iridium •the force of thousands of atomic bombs •A dust cloud high into the sky. •This cloud would block out nearly all of the sunlight, creating a long, cold, unnatural winter, drastically changing the climate for years to come. •The fe ...
CHAPTER 27
... males with larger antlers will win more fights and thus breed whilst the males with shorter antlers will not breed. Those who breed will pass their genes for large antlers on to their male offspring. ...
... males with larger antlers will win more fights and thus breed whilst the males with shorter antlers will not breed. Those who breed will pass their genes for large antlers on to their male offspring. ...
Inheritance – Summary
... 3. Describe an example of an improved characteristic in a named animal. Animal _________________________ Characteristic ___________________________________________________ Improvement ___________________________________________________ 4. One result of a chromosome mutation in humans is Down’s syndr ...
... 3. Describe an example of an improved characteristic in a named animal. Animal _________________________ Characteristic ___________________________________________________ Improvement ___________________________________________________ 4. One result of a chromosome mutation in humans is Down’s syndr ...
the Note
... new strains (micro-organisms) and new varieties (plants). New varieties of plants and animal breeds are produced relatively quickly by selecting parent organisms with the desired traits. The commercially viable organism would be homozygous for all the genes involved, whether dominant or recessiv ...
... new strains (micro-organisms) and new varieties (plants). New varieties of plants and animal breeds are produced relatively quickly by selecting parent organisms with the desired traits. The commercially viable organism would be homozygous for all the genes involved, whether dominant or recessiv ...
Speciation - Lake Worth ISD
... with or without geographic separation • Speciation can occur in two ways: – Allopatric speciation – Sympatric speciation • What do the route words mean? ...
... with or without geographic separation • Speciation can occur in two ways: – Allopatric speciation – Sympatric speciation • What do the route words mean? ...
Name: Date: Period: _____ Unit 2 Notes, Part 1 – Macroevolution
... of the lake. The arrow cichlid evolved from a population of the midas cichlid that adapted to live and eat in the open water (i.e. the deeper water in the middle of the lake). These arrow cichlid evolved to have a different body size, jaw shape, and tooth size and shape from the midas cichlid as a r ...
... of the lake. The arrow cichlid evolved from a population of the midas cichlid that adapted to live and eat in the open water (i.e. the deeper water in the middle of the lake). These arrow cichlid evolved to have a different body size, jaw shape, and tooth size and shape from the midas cichlid as a r ...
Jeopardy: Evolution of Life Natural Adaptations Speciation Human
... Large volume to produce lots of heat, small surface area to prevent heat loss, thick fur coat, layer of blubber ...
... Large volume to produce lots of heat, small surface area to prevent heat loss, thick fur coat, layer of blubber ...
DNA- (Deoxyribonucleic acid)- genetic material that carries the
... Guanine (G), Cytosine (C) are the nitrogen bases. Adenine always pairs with Thymine and Guanine always pairs with Cytosine. With these four base pairs, there are 8,000,000 possible outcomes between two parents and the arrangement of chromosomes. The order of the nitrogen bases is a genetic code to p ...
... Guanine (G), Cytosine (C) are the nitrogen bases. Adenine always pairs with Thymine and Guanine always pairs with Cytosine. With these four base pairs, there are 8,000,000 possible outcomes between two parents and the arrangement of chromosomes. The order of the nitrogen bases is a genetic code to p ...
Hybrid (biology)
In biology a hybrid, also known as cross breed, is the result of mixing, through sexual reproduction, two animals or plants of different breeds, varieties, species or genera. Using genetic terminology, it may be defined as follows. Hybrid generally refers to any offspring resulting from the breeding of two genetically distinct individuals, which usually will result in a high degree of heterozygosity, though hybrid and heterozygous are not, strictly speaking, synonymous. a genetic hybrid carries two different alleles of the same gene a structural hybrid results from the fusion of gametes that have differing structure in at least one chromosome, as a result of structural abnormalities a numerical hybrid results from the fusion of gametes having different haploid numbers of chromosomes a permanent hybrid is a situation where only the heterozygous genotype occurs, because all homozygous combinations are lethal.From a taxonomic perspective, hybrid refers to: Offspring resulting from the interbreeding between two animal species or plant species. See also hybrid speciation. Hybrids between different subspecies within a species (such as between the Bengal tiger and Siberian tiger) are known as intra-specific hybrids. Hybrids between different species within the same genus (such as between lions and tigers) are sometimes known as interspecific hybrids or crosses. Hybrids between different genera (such as between sheep and goats) are known as intergeneric hybrids. Extremely rare interfamilial hybrids have been known to occur (such as the guineafowl hybrids). No interordinal (between different orders) animal hybrids are known. The third type of hybrid consists of crosses between populations, breeds or cultivars within a single species. This meaning is often used in plant and animal breeding, where hybrids are commonly produced and selected, because they have desirable characteristics not found or inconsistently present in the parent individuals or populations.↑ ↑ ↑ ↑