Lecture 6
... would be (unwittingly) getting mates with genes for good immune systems and would pass these good genes on to both their male and female offspring. In addition, females that mate with ‘showy’ males would also tend to produce male offspring that would develop showy tails. These male offspring would h ...
... would be (unwittingly) getting mates with genes for good immune systems and would pass these good genes on to both their male and female offspring. In addition, females that mate with ‘showy’ males would also tend to produce male offspring that would develop showy tails. These male offspring would h ...
Chapter 16
... that occurs during production of gametes ♦ Cause most inheritable differences between relatives ♦ Occurs during meiosis ♦ As a result, sexual reproduction is a major source of variation in organisms. ♦ Despite gene shuffling, the frequency of alleles does not change in a population. Explain why this ...
... that occurs during production of gametes ♦ Cause most inheritable differences between relatives ♦ Occurs during meiosis ♦ As a result, sexual reproduction is a major source of variation in organisms. ♦ Despite gene shuffling, the frequency of alleles does not change in a population. Explain why this ...
Overview of Lecture: Microevolution II Read: Text Ch 20 Bullet
... MHC-dependent mate preferences in humans. Wedekind et al. 1995. Proc. Roy. Soc. Lond. B 260: 245-249. One … benefit of sexual reproduction could be that it allows animals (including humans) to evolve rapidly to a continuously changing environmental selecti ...
... MHC-dependent mate preferences in humans. Wedekind et al. 1995. Proc. Roy. Soc. Lond. B 260: 245-249. One … benefit of sexual reproduction could be that it allows animals (including humans) to evolve rapidly to a continuously changing environmental selecti ...
Evolution of Duplicated Genomes
... 1. DNA-binding domain in FLO and MADS domain in DEF are under stronger purifying selection than other domains. 2. FLOB has higher than FLOA in both domains 3. DEF’s increase in is due to I, K, and C-terminus domains ...
... 1. DNA-binding domain in FLO and MADS domain in DEF are under stronger purifying selection than other domains. 2. FLOB has higher than FLOA in both domains 3. DEF’s increase in is due to I, K, and C-terminus domains ...
Realized Heritability
... Realized Heritability Selection can act on any phenotypic variation, but can only cause evolutionary change if the variation is genetic. Population biologists often use an index called realized heritability, h2, to quantify the degree to which a trait in a population can be pushed by selection. To c ...
... Realized Heritability Selection can act on any phenotypic variation, but can only cause evolutionary change if the variation is genetic. Population biologists often use an index called realized heritability, h2, to quantify the degree to which a trait in a population can be pushed by selection. To c ...
Mechanisms of Non Mechanisms of Non
... Deal out a set of cards from a full deck and some suites or numbers will not be represented in the hand. The elimination of cards occurred by random sampling, not by any process of selection. An analogous process involving the chance loss of alleles occurs during reproduction. ...
... Deal out a set of cards from a full deck and some suites or numbers will not be represented in the hand. The elimination of cards occurred by random sampling, not by any process of selection. An analogous process involving the chance loss of alleles occurs during reproduction. ...
Evolution…
... Phylogeny Problem and Topic selection for paper) Documentary OR day off with an evening viewing of the documentary?? Schedule? Origins of Life Origins of Structure & Adaptation Origins of Species ...
... Phylogeny Problem and Topic selection for paper) Documentary OR day off with an evening viewing of the documentary?? Schedule? Origins of Life Origins of Structure & Adaptation Origins of Species ...
Study Notes
... Read the section on page 330 with the following heading NATURAL SELECTION ACTS ON DISTRIBUTIONS OF TRAITS In a crowd of 100,000 people, would you expect the mean height to be short, medium, or tall? _____________ In _____________ ________________ natural selection favors individuals with the average ...
... Read the section on page 330 with the following heading NATURAL SELECTION ACTS ON DISTRIBUTIONS OF TRAITS In a crowd of 100,000 people, would you expect the mean height to be short, medium, or tall? _____________ In _____________ ________________ natural selection favors individuals with the average ...
mechanisms of evolution: genetic variation
... • In small populations, chance can play a huge role in altering allele frequencies • When a severe event results in a drastic reduction in numbers, a population may experience a bottle-neck effect • In this form of genetic drift occurs, a very small number of sample alleles survives to establish a n ...
... • In small populations, chance can play a huge role in altering allele frequencies • When a severe event results in a drastic reduction in numbers, a population may experience a bottle-neck effect • In this form of genetic drift occurs, a very small number of sample alleles survives to establish a n ...
Selection
... in allele frequencies from generation to generation occur in a unique manner and can be unambiguously predicted from knowledge of initial conditions. Strictly speaking, this approach applies only when: (1) the population is infinite in size, and (2) the environment either remains constant with time ...
... in allele frequencies from generation to generation occur in a unique manner and can be unambiguously predicted from knowledge of initial conditions. Strictly speaking, this approach applies only when: (1) the population is infinite in size, and (2) the environment either remains constant with time ...
Speciation
... – Apple finding males mate with apple finding females – Hawthorn finding males mate with hawthorn finding females – About 94% of fly matings are with same type • But that leaves about 6% of matings apple-hawthorn • That’s still a lot of gene flow ...
... – Apple finding males mate with apple finding females – Hawthorn finding males mate with hawthorn finding females – About 94% of fly matings are with same type • But that leaves about 6% of matings apple-hawthorn • That’s still a lot of gene flow ...
SYLLABUS Breeding 20102011
... Prerequisite: Sheep Production (602214) Office Hours: 12:00 – 1:00 S, T ...
... Prerequisite: Sheep Production (602214) Office Hours: 12:00 – 1:00 S, T ...
16-1 16-2 lecture
... that has two alleles (forms) Widow’s peak is a single trait gene Allele for widow’s peak is dominant over the allele for ...
... that has two alleles (forms) Widow’s peak is a single trait gene Allele for widow’s peak is dominant over the allele for ...
Standard 4 study guide
... 13.The three-toed sloth is a very slow moving mammal that lives in the rainforest. This animal inhabits trees and is only able to live in warm, humid environments. Due to its slow movement (and the presence of warmth and moisture), a green mold will often grow on the fur of the sloth, helping it to ...
... 13.The three-toed sloth is a very slow moving mammal that lives in the rainforest. This animal inhabits trees and is only able to live in warm, humid environments. Due to its slow movement (and the presence of warmth and moisture), a green mold will often grow on the fur of the sloth, helping it to ...
Mutations - JeongAPbiology
... That means 50% are heterozygous (250 individuals) ***BUT then again this is a perfect world, in reality it might not be so nice with the numbers ...
... That means 50% are heterozygous (250 individuals) ***BUT then again this is a perfect world, in reality it might not be so nice with the numbers ...
ch 16 notes mader
... e. The founder effect is an example of genetic drift where rare alleles or combinations occur in higher frequency in a population isolated from the general population. 1) This is due to founding individuals containing a fraction of total genetic diversity of the original population. 2) Which particu ...
... e. The founder effect is an example of genetic drift where rare alleles or combinations occur in higher frequency in a population isolated from the general population. 1) This is due to founding individuals containing a fraction of total genetic diversity of the original population. 2) Which particu ...
Genetic selection and variation
... The effect is splashes of color. They can be distinguished from chimeras because the variegation pattern is inherited from seed. ...
... The effect is splashes of color. They can be distinguished from chimeras because the variegation pattern is inherited from seed. ...
Pop gen cont - Faculty Web Pages
... 1. Directional selection - favors survival of one extreme phenotype that is better adapted to an environmental condition 2. Stabilizing selection - favors the survival of individuals with ...
... 1. Directional selection - favors survival of one extreme phenotype that is better adapted to an environmental condition 2. Stabilizing selection - favors the survival of individuals with ...
Unit 8 (Microevolution) Study Guide KEY
... in a population can then be shuffled once these variations have been created. Explain how each of the following aspects of evolution affect the phenotypic frequencies in population. ...
... in a population can then be shuffled once these variations have been created. Explain how each of the following aspects of evolution affect the phenotypic frequencies in population. ...
Group selection
Group selection is a proposed mechanism of evolution in which natural selection is imagined to act at the level of the group, instead of at the more conventional level of the individual.Early authors such as V. C. Wynne-Edwards and Konrad Lorenz argued that the behavior of animals could affect their survival and reproduction as groups.From the mid 1960s, evolutionary biologists such as John Maynard Smith argued that natural selection acted primarily at the level of the individual. They argued on the basis of mathematical models that individuals would not altruistically sacrifice fitness for the sake of a group. They persuaded the majority of biologists that group selection did not occur, other than in special situations such as the haplodiploid social insects like honeybees (in the Hymenoptera), where kin selection was possible.In 1994 David Sloan Wilson and Elliott Sober argued for multi-level selection, including group selection, on the grounds that groups, like individuals, could compete. In 2010 three authors including E. O. Wilson, known for his work on ants, again revisited the arguments for group selection, provoking a strong rebuttal from a large group of evolutionary biologists. As of yet, there is no clear consensus among biologists regarding the importance of group selection.