Biology of Sponges video/DVD guide.
... • Few types of animals can grow an entirely new adult animal from a small fragment broken off of an individual. What factors enable sponges to do this? • Although the experiments are not shown in this program, discuss laboratory experiments where sponges put through a nylon mesh will reconstitute a ...
... • Few types of animals can grow an entirely new adult animal from a small fragment broken off of an individual. What factors enable sponges to do this? • Although the experiments are not shown in this program, discuss laboratory experiments where sponges put through a nylon mesh will reconstitute a ...
Why hybrid males are sterile in Drosophila?
... In the genus Drosophila, interspecific hybridization between most species pairs produces sterile males and fertile females3. Why there is a discrimination of sex for sterility in hybrids or why hybrid males are sterile have been an intriguing question for evolutionary biologists for a long time. Als ...
... In the genus Drosophila, interspecific hybridization between most species pairs produces sterile males and fertile females3. Why there is a discrimination of sex for sterility in hybrids or why hybrid males are sterile have been an intriguing question for evolutionary biologists for a long time. Als ...
Non-random Allelic Variation
... “a coach selects a team of oarsmen for a crew race by repeatedly shifting oarsmen among several boats and racing them, after several trials the winning boat will have all the same oarsmen. A crew member finally chosen will have been grouped with both good and inferior ones at different times, but on ...
... “a coach selects a team of oarsmen for a crew race by repeatedly shifting oarsmen among several boats and racing them, after several trials the winning boat will have all the same oarsmen. A crew member finally chosen will have been grouped with both good and inferior ones at different times, but on ...
Genomic variations and distinct evolutionary rate of rare alleles in
... the natural population and the use of genome-wide SNPs in genome wide association studies provides not only the discovery of truly de novo candidate gene, but also interprets the comprehensive view of genetic architecture of the traits [11]. The genome-wide surveys of nucleotide polymorphisms in Ara ...
... the natural population and the use of genome-wide SNPs in genome wide association studies provides not only the discovery of truly de novo candidate gene, but also interprets the comprehensive view of genetic architecture of the traits [11]. The genome-wide surveys of nucleotide polymorphisms in Ara ...
515-527 - CiteSeerX
... mutant form; (ii) the combination of floral homeotic gene activities present in any particular whorl specifies the type of organ that develops in that whorl, e.g., A class alone specifies sepals, classes A + Β specify petals, classes Β + C specify stamens, and C class alone specifies carpels; and (i ...
... mutant form; (ii) the combination of floral homeotic gene activities present in any particular whorl specifies the type of organ that develops in that whorl, e.g., A class alone specifies sepals, classes A + Β specify petals, classes Β + C specify stamens, and C class alone specifies carpels; and (i ...
On Adaptive Accuracy and Precision in Natural Populations
... to think of traits in isolation. Developmental disturbances can occur at all levels of organismal integration and are likely to have pleiotropic effects on many characters. It is less likely that a whole suite of developmentally linked characters will all cease to be under stabilizing selection at t ...
... to think of traits in isolation. Developmental disturbances can occur at all levels of organismal integration and are likely to have pleiotropic effects on many characters. It is less likely that a whole suite of developmentally linked characters will all cease to be under stabilizing selection at t ...
The evolutionary history of the CCR5-Δ32 HIV
... the data and the methodologies differ between these two studies, but both approaches rely on the common principle that the amount of recombination and mutation observed on genomic regions surrounding the CCR5-D32 deletion will be proportional to the age of the deletion. Stephens et al. adopted a coa ...
... the data and the methodologies differ between these two studies, but both approaches rely on the common principle that the amount of recombination and mutation observed on genomic regions surrounding the CCR5-D32 deletion will be proportional to the age of the deletion. Stephens et al. adopted a coa ...
Advances in Environmental Biology Zahra Maryami, Arash Fazeli, Ali-Ashraf Mehrabi
... (GBSSI) is one of the most important determinants of starch synthesis of cereals [7] which are located on the group-7 chromosomes of each genomes [8,9]. In bread wheat (TriticumaestivumL. ssp. aestivum; 2n = 6x = 42, AABBDD), three waxy proteins, one for each genome, have been identified. Each waxy ...
... (GBSSI) is one of the most important determinants of starch synthesis of cereals [7] which are located on the group-7 chromosomes of each genomes [8,9]. In bread wheat (TriticumaestivumL. ssp. aestivum; 2n = 6x = 42, AABBDD), three waxy proteins, one for each genome, have been identified. Each waxy ...
CoevolPaper2 - University of Illinois Archives
... various taxa group into three distinct clusters (bacteria, archaea, eukaryotes), with the latter two showing the most structure and sequence similarity. While the canonical pattern provides evidence that the universal r-proteins were present at the so-called base of the UPT, the situation is less cl ...
... various taxa group into three distinct clusters (bacteria, archaea, eukaryotes), with the latter two showing the most structure and sequence similarity. While the canonical pattern provides evidence that the universal r-proteins were present at the so-called base of the UPT, the situation is less cl ...
3.1.molecular_evolution - T
... Another prediction of Neutral Theory--Because mutation is regular (or “clocklike”) and because selection does not influence the rate of divergence, divergence of DNA and protein molecules in two separate lineages should occur in a REGULAR, clocklike manner ...
... Another prediction of Neutral Theory--Because mutation is regular (or “clocklike”) and because selection does not influence the rate of divergence, divergence of DNA and protein molecules in two separate lineages should occur in a REGULAR, clocklike manner ...
A molecular marker map for roses - Wageningen UR E
... makers based on the PCR reaction allowed the rapid map construction even in species with difficult genetic systems (Staub et al. 1996). Over the last years several maps have been generated for a number of woody species including the major fruit tree species (Davis et al. 1997, Baird et al. 1996, Hem ...
... makers based on the PCR reaction allowed the rapid map construction even in species with difficult genetic systems (Staub et al. 1996). Over the last years several maps have been generated for a number of woody species including the major fruit tree species (Davis et al. 1997, Baird et al. 1996, Hem ...
mutation and Y486D mutation in exon 5 of the UGT1A1 - Funpec-RP
... level of 1-6 mg/dL (Bosma et al., 1995; Bayram et al., 2013). CN is related to inborn errors in metabolism and are inherited as autosomal recessive traits. These traits result from unconjugated hyperbilirubinemia because of defective bilirubin uridinediphosphate (UDP)glucuronosyltransferase (UGT1A1) ...
... level of 1-6 mg/dL (Bosma et al., 1995; Bayram et al., 2013). CN is related to inborn errors in metabolism and are inherited as autosomal recessive traits. These traits result from unconjugated hyperbilirubinemia because of defective bilirubin uridinediphosphate (UDP)glucuronosyltransferase (UGT1A1) ...
Atmospheric oxygen level and the evolution of insect body size
... only affect the largest individuals within a species or the largest species. For example, higher aPO2 might relieve some upper constraint on body size, leading to increases in size of the very largest individuals (figure 2d ). The remainder of this section will examine the empirical data related to ...
... only affect the largest individuals within a species or the largest species. For example, higher aPO2 might relieve some upper constraint on body size, leading to increases in size of the very largest individuals (figure 2d ). The remainder of this section will examine the empirical data related to ...
1 Walter Arndt Lecture: The Autonomy of Biology Ernst Mayr Science
... find any supporters. Two causes were largely responsible for this, first the failure of literally thousands of failed experiments conducted to prove the existence of a Lebenskraft, and secondly, the realization that the new biology, with the methods of genetics and molecular biology, was able to sol ...
... find any supporters. Two causes were largely responsible for this, first the failure of literally thousands of failed experiments conducted to prove the existence of a Lebenskraft, and secondly, the realization that the new biology, with the methods of genetics and molecular biology, was able to sol ...
Understanding Genetics and the Sire Summaries
... Charity, needs improvement in both foot angle and teat placement. Heritability for foot angle is .15 and for front teat placement is .26. Given the same selection intensity for both traits, Charity’s offspring are expected to improve more rapidly in teat placement than foot angle because the heritab ...
... Charity, needs improvement in both foot angle and teat placement. Heritability for foot angle is .15 and for front teat placement is .26. Given the same selection intensity for both traits, Charity’s offspring are expected to improve more rapidly in teat placement than foot angle because the heritab ...
Opener 1/6/2015 1. What is biology? 2. What are the four classroom
... 1. What is the overall formula for cellular respiration? 2. What happens in glycolysis? 3. What happens in the krebs cycle? 4. What happens in the ETC? 5. When a person loses weight, where does it go? ...
... 1. What is the overall formula for cellular respiration? 2. What happens in glycolysis? 3. What happens in the krebs cycle? 4. What happens in the ETC? 5. When a person loses weight, where does it go? ...
Efficient Screening of CRISPR/Cas9
... the recessive gene, ebony (e). The advantages of this approach in Drosophila are that e mutations are not lethal, are easy to score, and are not part of the common transgenic fly strategies. Crossing the injected offspring with e flies and identifying their e broods allows the quick identification of j ...
... the recessive gene, ebony (e). The advantages of this approach in Drosophila are that e mutations are not lethal, are easy to score, and are not part of the common transgenic fly strategies. Crossing the injected offspring with e flies and identifying their e broods allows the quick identification of j ...
The Origin of Species
... • Darwin was influenced by Thomas Malthus who noted the potential for human population to increase faster than food supplies and other resources Ò食物收成與其他因素牽動人口族群變動 • If some heritable traits are advantageous, these will accumulate in the population, and this will increase the frequency of individual ...
... • Darwin was influenced by Thomas Malthus who noted the potential for human population to increase faster than food supplies and other resources Ò食物收成與其他因素牽動人口族群變動 • If some heritable traits are advantageous, these will accumulate in the population, and this will increase the frequency of individual ...
The Evolutionary History of Human and Chimpanzee Y
... Gene loss at any particular region of the genome can result in many unpredicted changes in phenotype; however, lineage-specific gene loss on the Y-chromosome is of particular interest because this chromosome is highly enriched for genes involved in spermatogenesis (Lahn and Page 1997; Skaletsky et a ...
... Gene loss at any particular region of the genome can result in many unpredicted changes in phenotype; however, lineage-specific gene loss on the Y-chromosome is of particular interest because this chromosome is highly enriched for genes involved in spermatogenesis (Lahn and Page 1997; Skaletsky et a ...
www.theallpapers.com
... Fig. 1.1 shows a southern cassowary, Casuarius casuarius, which is a large bird that cannot fly. It lives in rainforests in northern Australia and southern New Guinea. The cassowary feeds on fruits and helps to disperse seeds for many tree species, such as the cassowary plum. ...
... Fig. 1.1 shows a southern cassowary, Casuarius casuarius, which is a large bird that cannot fly. It lives in rainforests in northern Australia and southern New Guinea. The cassowary feeds on fruits and helps to disperse seeds for many tree species, such as the cassowary plum. ...
Variant 1
... Fig. 1.1 shows a southern cassowary, Casuarius casuarius, which is a large bird that cannot fly. It lives in rainforests in northern Australia and southern New Guinea. The cassowary feeds on fruits and helps to disperse seeds for many tree species, such as the cassowary plum. ...
... Fig. 1.1 shows a southern cassowary, Casuarius casuarius, which is a large bird that cannot fly. It lives in rainforests in northern Australia and southern New Guinea. The cassowary feeds on fruits and helps to disperse seeds for many tree species, such as the cassowary plum. ...
Having sex, yes, but with whom? Inferences from fungi on the
... (Received 3 November 2009; revised 15 July 2010; accepted 16 July 2010) ...
... (Received 3 November 2009; revised 15 July 2010; accepted 16 July 2010) ...
Having sex, yes, but with whom? Inferences from fungi
... (Received 3 November 2009; revised 15 July 2010; accepted 16 July 2010) ...
... (Received 3 November 2009; revised 15 July 2010; accepted 16 July 2010) ...
Number 2 - Laboratory Animal Boards Study Group
... strains, providing novel allelic variants and phenotypes. Experimental animals used as models for human diseases should constitute genetic variations similar to human populations. Well known inbred strains, however, represent only a relatively small part of the genetic divergence of the Mus species. ...
... strains, providing novel allelic variants and phenotypes. Experimental animals used as models for human diseases should constitute genetic variations similar to human populations. Well known inbred strains, however, represent only a relatively small part of the genetic divergence of the Mus species. ...
Stanford Encyclopedia of Philosophy
... a head (this issue was revisited in the 1990s with the publication of Herrnstein and Murray (1999)), and in the late 1970s and early 1980s sociobiology came under critical scrutiny. Both proponents of the hereditary nature of IQ and sociobiologists made a connection between human behavioral traits a ...
... a head (this issue was revisited in the 1990s with the publication of Herrnstein and Murray (1999)), and in the late 1970s and early 1980s sociobiology came under critical scrutiny. Both proponents of the hereditary nature of IQ and sociobiologists made a connection between human behavioral traits a ...
Koinophilia
Koinophilia is an evolutionary hypothesis concerning sexual selection which proposes that animals seeking mate preferentially choose individuals with a minimum of unusual features. Koinophilia intends to explain the clustering of organisms into species and other issues described by Darwin's Dilemma. The term derives from the Greek, koinos, ""the usual"", and philos, ""fondness"".Natural selection causes beneficial inherited features to become more common and eventually replace their disadvantageous counterparts. A sexually-reproducing animal would be expected to avoid individuals with unusual features, and to prefer to mate with individuals displaying a predominance of common or average features. This means that mates displaying mutant features are also avoided. This is advantageous because most mutations that manifest themselves as changes in appearance, functionality or behavior, are disadvantageous. Because it is impossible to judge whether a new mutation is beneficial or not, koinophilic animals avoid them all, at the cost of avoiding the occasional beneficial mutation. Thus, koinophilia, although not infallible in its ability to distinguish fit from unfit mates, is a good strategy when choosing a mate. A koinophilic choice ensures that offspring are likely to inherit features that have been successful in the past.Koinophilia differs from assortative mating, where ""like prefers like"". If like preferred like, leucistic animals (such as white peacocks) would be sexually attracted to one another, and a leucistic subspecies would come into being. Koinophilia predicts that this is unlikely because leucistic animals are attracted to the average in the same way as other animals. Since non-leucistic animals are not attracted by leucism, few leucistic individuals find mates, and leucistic lineages will rarely form.Koinophilia provides simple explanations for the rarity of speciation (in particular Darwin's Dilemma), evolutionary stasis, punctuated equilibria, and the evolution of cooperation. Koinophilia might also contribute to the maintenance of sexual reproduction, preventing its reversion to the much simpler and inherently more advantageous asexual form of reproduction.The koinophilia hypothesis is supported by research into the physical attractiveness of human faces by Judith Langlois and her co-workers. They found that the average of two human faces was more attractive than either of the faces from which that average was derived. The more faces (of the same gender and age) that were used in the averaging process the more attractive and appealing the average face became. This work into averageness supports koinophilia as an explanation of what constitutes a beautiful face, and how the individuality of a face is recognized.