Hodgkin 1980
... LEWand W m 1978). lsolation of her mutants: A strain (CB2300) was constructed, of genotype him-51ei490) dpy21(e428) V ; unc-7(e5) X . The unc-7 marker was included to prevent crossing between males and hermaphrodites, which is otherwise likely to reduce homozygosis and prevent expression of recessiv ...
... LEWand W m 1978). lsolation of her mutants: A strain (CB2300) was constructed, of genotype him-51ei490) dpy21(e428) V ; unc-7(e5) X . The unc-7 marker was included to prevent crossing between males and hermaphrodites, which is otherwise likely to reduce homozygosis and prevent expression of recessiv ...
(From the ZoOlogical Laboratory of Columbia
... Relation between Vermilion-Deficiency and Vermilion-Duplication. That the deficient region actually does extend to the left of the vermilion locus was indicated by use of vermilion-duplication. The stock of vermilion-duplication consists of flies homozygous for the vermilion gene and at the same tim ...
... Relation between Vermilion-Deficiency and Vermilion-Duplication. That the deficient region actually does extend to the left of the vermilion locus was indicated by use of vermilion-duplication. The stock of vermilion-duplication consists of flies homozygous for the vermilion gene and at the same tim ...
Comprehension Questions
... an affected father can have an unaffected son (indicated by a solid arrow) and also because we see sons inheriting the trait from their mother (indicated by an open arrow). Moreover, this trait cannot be X-linked because it is often passed from father to son, whereas X-linked traits are passed from ...
... an affected father can have an unaffected son (indicated by a solid arrow) and also because we see sons inheriting the trait from their mother (indicated by an open arrow). Moreover, this trait cannot be X-linked because it is often passed from father to son, whereas X-linked traits are passed from ...
440selection - eweb.furman.edu
... Δp declines with each generation. Rate of change also depends on the strength of selection; the difference in reproductive success among genotypes. ...
... Δp declines with each generation. Rate of change also depends on the strength of selection; the difference in reproductive success among genotypes. ...
An essential cell cycle regulation gene causes hybrid inviability in
... F1 females). Of these, 26 males were the result of a nondisjunction event that led to their inheriting a D. simulans X-chromosome (11); these males were viable, as shown previously (2). Further tests confirmed that we had recovered six independently produced rescue hybrid F1 males, each of which is ...
... F1 females). Of these, 26 males were the result of a nondisjunction event that led to their inheriting a D. simulans X-chromosome (11); these males were viable, as shown previously (2). Further tests confirmed that we had recovered six independently produced rescue hybrid F1 males, each of which is ...
Do male secondary sexual characters signal ejaculate quality? A
... secondary sexual characters (SSCs) and ‘ejaculate quality’ (defined as sperm/ejaculate traits that are widely assumed to increase female fertility and/or sperm competitiveness). First, if the relationship is positive then females could gain a direct benefit by choosing more attractive males for fert ...
... secondary sexual characters (SSCs) and ‘ejaculate quality’ (defined as sperm/ejaculate traits that are widely assumed to increase female fertility and/or sperm competitiveness). First, if the relationship is positive then females could gain a direct benefit by choosing more attractive males for fert ...
CHARACTER CHANGES CAUSED BY MUTATION OF AN ENTIRE
... But in addition to allowing them to show, this new deficiency exaggerates the effect of all known mutant genes located in the corresponding region of the opposite X chromosome. This effect was not observed in the case of bar-deficiency. The analysis of bar-deficiency led to the conclusion that defic ...
... But in addition to allowing them to show, this new deficiency exaggerates the effect of all known mutant genes located in the corresponding region of the opposite X chromosome. This effect was not observed in the case of bar-deficiency. The analysis of bar-deficiency led to the conclusion that defic ...
Reprint
... Fisher’s process are structurally unstable (Bulmer 1989). Here a model of Fisher’s runaway process is presented to demonstrate that costly female preference evolves very easily when space is explicitly included in the model. The only requirement is that the optimal male phenotype changes across the ...
... Fisher’s process are structurally unstable (Bulmer 1989). Here a model of Fisher’s runaway process is presented to demonstrate that costly female preference evolves very easily when space is explicitly included in the model. The only requirement is that the optimal male phenotype changes across the ...
“Ah, excuse me…I like your shirt”: An examination of compliment
... female observers. Such results led Abbey (1982: 836) to suggest that men perceive the world in more sexual terms than do women. Shotland and Craig (1988) built on Abbey’s study in an effort to investigate whether males or females can in fact differentiate between friendly and sexually ...
... female observers. Such results led Abbey (1982: 836) to suggest that men perceive the world in more sexual terms than do women. Shotland and Craig (1988) built on Abbey’s study in an effort to investigate whether males or females can in fact differentiate between friendly and sexually ...
Seasonal Timing of Reproduction and Hibernation in the Edible
... mammalian hibernators in seasonal fluctuating environments often face extreme limits caused by the short duration of their active season. Within a few months they have to undergo gonadal development, because hypothermia and sexual competence are not compatible (e.g., Barnes et al., 1986); establish ...
... mammalian hibernators in seasonal fluctuating environments often face extreme limits caused by the short duration of their active season. Within a few months they have to undergo gonadal development, because hypothermia and sexual competence are not compatible (e.g., Barnes et al., 1986); establish ...
TWO SEXES. Why? The Evolutionary Theory of Sex
... What do we need two sexes for? What is the evolutionary significance of this phenomenon? What is the nature of the differences between the sexes? What is sexual dimorphism and what does it mean? How is it connected to other life phenomena? The new evolutionary theory of sex differentiation developed ...
... What do we need two sexes for? What is the evolutionary significance of this phenomenon? What is the nature of the differences between the sexes? What is sexual dimorphism and what does it mean? How is it connected to other life phenomena? The new evolutionary theory of sex differentiation developed ...
History of Evolutionary Thought in Biology Lecture 1 Slide 2
... 2) Natural Selection 3) Sexual Selection Inspirations of Darwin’s New Theory Artificial breeding of domesticated species (particularly pigeons) artificial selection by breeders served as a model for natural selection (variation in time) Slide 30 Inspirations of Darwin’s New Theory Social theory- par ...
... 2) Natural Selection 3) Sexual Selection Inspirations of Darwin’s New Theory Artificial breeding of domesticated species (particularly pigeons) artificial selection by breeders served as a model for natural selection (variation in time) Slide 30 Inspirations of Darwin’s New Theory Social theory- par ...
Chapter 3: Selection and Adaptation Barry Sinervo © 1997-2007
... or linked. The linkage between genes is not a physical linkage where two loci lie in close proximity on the same chromosome. In the case of runaway sexual selection, the genes become inextricably linked by the strength of selection. The runaway model explains correlated evolution of female behavior ...
... or linked. The linkage between genes is not a physical linkage where two loci lie in close proximity on the same chromosome. In the case of runaway sexual selection, the genes become inextricably linked by the strength of selection. The runaway model explains correlated evolution of female behavior ...
Males with MECP2 Mutations
... these clinical features were subsequently given the designation of Rett syndrome in 1983 in recognition of Dr. Rett’s original report. Rett syndrome is still considered a clinical diagnosis based on specific developmental history and clinical criteria. These clinical criteria were last revised i ...
... these clinical features were subsequently given the designation of Rett syndrome in 1983 in recognition of Dr. Rett’s original report. Rett syndrome is still considered a clinical diagnosis based on specific developmental history and clinical criteria. These clinical criteria were last revised i ...
Males with MECP2 Mutations
... Because these males have two copies of the X chromosome and undergo the same process of X inactivation that is seen in females, these males present with a clinical presentation that is very consistent with the classic Rett syndrome presentation. These males, will in addition to having the clinical f ...
... Because these males have two copies of the X chromosome and undergo the same process of X inactivation that is seen in females, these males present with a clinical presentation that is very consistent with the classic Rett syndrome presentation. These males, will in addition to having the clinical f ...
The effect of learning on the evolution of new courtship behavior: A
... learning on evolution driven by sexual selection. In response to this gap, one of us (Kawecki, 2013) proposed a verbal scenario under which individual learning of a courtship trait might expedite the evolution of a novel courtship trait under pre-existing female sensory bias. The present study uses ...
... learning on evolution driven by sexual selection. In response to this gap, one of us (Kawecki, 2013) proposed a verbal scenario under which individual learning of a courtship trait might expedite the evolution of a novel courtship trait under pre-existing female sensory bias. The present study uses ...
Fabry Disease in Females
... members, and family screening should be conducted. Since Fabry disease is progressive and can result in irreversible organ damage, early diagnosis of affected family members has the potential to change the course of the disease in those people. A medical genetic counselor can work with patients to d ...
... members, and family screening should be conducted. Since Fabry disease is progressive and can result in irreversible organ damage, early diagnosis of affected family members has the potential to change the course of the disease in those people. A medical genetic counselor can work with patients to d ...
1 - bioRxiv
... Mating behavior in wild-type Drosophila consists of a series of courting activities and subsequent copulation. Successful mating is a consequence of sexual interactions between specific male stimuli and appropriate female responses1 . Mating success is of great importance to the fitness of a populat ...
... Mating behavior in wild-type Drosophila consists of a series of courting activities and subsequent copulation. Successful mating is a consequence of sexual interactions between specific male stimuli and appropriate female responses1 . Mating success is of great importance to the fitness of a populat ...
Evolutionary ecology of rotifers - with emphasis on life
... Part 1: Life history strategies and population ecology There are strong mechanistic links between the life histories of individuals and population growth, and a rich theoretical population biology theory formalizes these connections. For example, matrix population models are defined on the age-spec ...
... Part 1: Life history strategies and population ecology There are strong mechanistic links between the life histories of individuals and population growth, and a rich theoretical population biology theory formalizes these connections. For example, matrix population models are defined on the age-spec ...
An Autosomal Dwarfism in the Domestic Fowl
... crossing over, respectively. In the Godfrey cross, in which the F1 females should, according to his hypothesis of a single recessive gene, carry that gene for small size and the males should be heterozygous, at 30 wk of age the females were only 69% as heavy as the F1 males. This difference is somew ...
... crossing over, respectively. In the Godfrey cross, in which the F1 females should, according to his hypothesis of a single recessive gene, carry that gene for small size and the males should be heterozygous, at 30 wk of age the females were only 69% as heavy as the F1 males. This difference is somew ...
Genetics III
... recessive. It is okay to have more than one inheritance pattern fit. It usually means that we need a bigger one with more generations and family (especially the in-laws). We know Grandfather is heterozygous because he has the dominant phenotype and so he must have inherited a dominant allele from Gr ...
... recessive. It is okay to have more than one inheritance pattern fit. It usually means that we need a bigger one with more generations and family (especially the in-laws). We know Grandfather is heterozygous because he has the dominant phenotype and so he must have inherited a dominant allele from Gr ...
Diversity in the Brain Sizes of Newborn Mammals
... large-brained offspring is to gestate them for a relatively long time and to have only one offspring per litter. Twenty-three of the families in our data set have offspring with brains larger than expected from maternal size (that is, they have relative neonatal brain size greater than zero). Of the ...
... large-brained offspring is to gestate them for a relatively long time and to have only one offspring per litter. Twenty-three of the families in our data set have offspring with brains larger than expected from maternal size (that is, they have relative neonatal brain size greater than zero). Of the ...
Slide 1
... • CI takes two forms, unidirectional and bidirectional. – Unidirectional incompatibility typically occurs when the sperm from a Wolbachia-infected male fertilizes an uninfected – The reciprocal cross (uninfected male and infected female) is ...
... • CI takes two forms, unidirectional and bidirectional. – Unidirectional incompatibility typically occurs when the sperm from a Wolbachia-infected male fertilizes an uninfected – The reciprocal cross (uninfected male and infected female) is ...
Sex Determination and Sex-Linked Characteristics
... to settle on a solid, unoccupied substrate develops into a female limpet. It then produces chemicals that attract other larvae, which settle on top of it. These larvae develop into males, which then serve as mates for the limpet below. After a period of time, the males on top develop into females an ...
... to settle on a solid, unoccupied substrate develops into a female limpet. It then produces chemicals that attract other larvae, which settle on top of it. These larvae develop into males, which then serve as mates for the limpet below. After a period of time, the males on top develop into females an ...
A Single Gene Causes Both Male Sterility and
... identification of several genes that cause hybrid sterility or inviability—many of which have evolved rapidly under positive Darwinian selection—little is known about the ecological or genomic forces that drive the evolution of postzygotic isolation. Here, we show that the same gene, Overdrive, caus ...
... identification of several genes that cause hybrid sterility or inviability—many of which have evolved rapidly under positive Darwinian selection—little is known about the ecological or genomic forces that drive the evolution of postzygotic isolation. Here, we show that the same gene, Overdrive, caus ...
Sexual dimorphism
Sexual dimorphism is a phenotypic differentiation between males and females of the same species. This differentiation happens in organisms who reproduce through sexual reproduction, with the prototypical example being for differences in characteristics of reproductive organs. Other possible examples are for secondary sex characteristics, body size, physical strength and morphology, ornamentation, behavior and other bodily traits. Traits such as ornamentation and breeding behavior found in only one sex imply that sexual selection over an extended period of time leads to sexual dimorphism.