Sex Chromosomes and Sexual Selection in Poeciliid Fishes
... morphism for these characters. Several have been shown to be attractive to females: conspicuous coloration, especially bright orange and black spots, large caudal fins, large body size, and high courtship display rate (Farr 1980; Bischoff et al. 1985; Reynolds and Gross 1992; Nicoletto 1993; Endler ...
... morphism for these characters. Several have been shown to be attractive to females: conspicuous coloration, especially bright orange and black spots, large caudal fins, large body size, and high courtship display rate (Farr 1980; Bischoff et al. 1985; Reynolds and Gross 1992; Nicoletto 1993; Endler ...
Get PDF - Wiley Online Library
... of partially sex-linked genes has not yet been studied quantitatively. We therefore examine the fates of new mutations in a PAR of a sex chromosome system. We ask whether PAR genes differ from autosomal loci in their tendency to fix alleles with sexspecific fitness effects (as fully sex-linked loci ...
... of partially sex-linked genes has not yet been studied quantitatively. We therefore examine the fates of new mutations in a PAR of a sex chromosome system. We ask whether PAR genes differ from autosomal loci in their tendency to fix alleles with sexspecific fitness effects (as fully sex-linked loci ...
The Alternate Modes of Heredity
... • Some traits are under the control of several pairs of genes acting together. These traits that are influenced by more than one pair of genes are said to be multifactorial traits. • A clear indicator of a multifactorial trait is that you see a continuous distribution expressed within the trait. • A ...
... • Some traits are under the control of several pairs of genes acting together. These traits that are influenced by more than one pair of genes are said to be multifactorial traits. • A clear indicator of a multifactorial trait is that you see a continuous distribution expressed within the trait. • A ...
Sex reversal: deletion mapping the male
... Mammalian molecular geneticists face the challenge of understanding how a fertilized egg develops into a mature organism, with all of its complex organ systems. Much has been learned about the molecular correlates of differentiation in, for example, hematopoietic cell lineages, but the molecular mec ...
... Mammalian molecular geneticists face the challenge of understanding how a fertilized egg develops into a mature organism, with all of its complex organ systems. Much has been learned about the molecular correlates of differentiation in, for example, hematopoietic cell lineages, but the molecular mec ...
Old Exams
... 5. Which of the following is true about the distribution of breast cancer? a) breast cancer incidence is higher in Eastern Europe than Western Europe b) breast cancer incidence is highest in areas with Mus musculus c) a+b d) neither a nor b 6. Strassmann’s results on Dogon women, and on women in oth ...
... 5. Which of the following is true about the distribution of breast cancer? a) breast cancer incidence is higher in Eastern Europe than Western Europe b) breast cancer incidence is highest in areas with Mus musculus c) a+b d) neither a nor b 6. Strassmann’s results on Dogon women, and on women in oth ...
Document
... 19. Which is true of the prairie chicken population in Illinois? a) hatching success has increased since 1990 b) individuals were imported from other states to increase gene flow c) a+b d) neither a nor b 20. Experiments by Paul Weeks provide evidence that the interaction between oxpeckers and cows ...
... 19. Which is true of the prairie chicken population in Illinois? a) hatching success has increased since 1990 b) individuals were imported from other states to increase gene flow c) a+b d) neither a nor b 20. Experiments by Paul Weeks provide evidence that the interaction between oxpeckers and cows ...
Parapatric distribution and sexual competition between two tick species,
... that area. Study sites included communal dip-tanks and corridors used for acaricide treatment by farmers, plus some farms with no access to such facilities. When possible, a minimum of 50 animals within 3 km (approximate grazing range) of sampling locations, or (when less) all animals present on far ...
... that area. Study sites included communal dip-tanks and corridors used for acaricide treatment by farmers, plus some farms with no access to such facilities. When possible, a minimum of 50 animals within 3 km (approximate grazing range) of sampling locations, or (when less) all animals present on far ...
Forensic Science International
... The crania from the Terry and Lisbon collections are of known sex. The California Indian crania were sexed according to standard procedures using cranial traits and, when post-cranial remains were present, pelvic morphology and metric characteristics of the long bones [6]. For the California Indian ...
... The crania from the Terry and Lisbon collections are of known sex. The California Indian crania were sexed according to standard procedures using cranial traits and, when post-cranial remains were present, pelvic morphology and metric characteristics of the long bones [6]. For the California Indian ...
1069 THE INTERSPECIFIC ORIGIN OF B CHROMOSOMES: EXPERIMENTAL EVIDENCE
... showed a distorted recovery of orv relative to or1g among hybrid males. Results of this general experiment will be reported elsewhere (F. Perfectti, J. Gadau and J. H. Werren, unpubl. ms.). However, in the eight backcross generation (BC8), we found one family that showed an extreme bias toward ‘‘or’ ...
... showed a distorted recovery of orv relative to or1g among hybrid males. Results of this general experiment will be reported elsewhere (F. Perfectti, J. Gadau and J. H. Werren, unpubl. ms.). However, in the eight backcross generation (BC8), we found one family that showed an extreme bias toward ‘‘or’ ...
Mating systems - WordPress.com
... • Sexual conflict – differential selection on males and females to maximize their fitness – Female fitness is most often limited by access to resources – Male fitness is most often limited by the number of mates ...
... • Sexual conflict – differential selection on males and females to maximize their fitness – Female fitness is most often limited by access to resources – Male fitness is most often limited by the number of mates ...
Reproductive versus ecological advantages to larger body size in
... higher fecundity in females, or greater copulatory rates in males) or because of ecological factors (such as an ability to ingest larger prey or to better withstand predator attacks or thermal extremes: Grigg et al. 1979, Magnhagen 1991, Arnold 1993). In practice, the two kinds of processes are tigh ...
... higher fecundity in females, or greater copulatory rates in males) or because of ecological factors (such as an ability to ingest larger prey or to better withstand predator attacks or thermal extremes: Grigg et al. 1979, Magnhagen 1991, Arnold 1993). In practice, the two kinds of processes are tigh ...
lecture 6 notes
... have an X too • Why aren’t male traits on the Y? – If sex-related traits evolved from other traits, they would tend to start ...
... have an X too • Why aren’t male traits on the Y? – If sex-related traits evolved from other traits, they would tend to start ...
BSC 2011 MENDELIAN GENETICS PROBLEMS The following
... a. Which is the correct mechanism of inheritance? autosomal dominant autosomal recessive y-linked x-linked dominant x-linked recessive b. Using the symbols "F" and "f" to indicate dominance and recessiveness, show the genotypes of the parents at B. c. In the marriage at C, what is the probability th ...
... a. Which is the correct mechanism of inheritance? autosomal dominant autosomal recessive y-linked x-linked dominant x-linked recessive b. Using the symbols "F" and "f" to indicate dominance and recessiveness, show the genotypes of the parents at B. c. In the marriage at C, what is the probability th ...
MAINTENANCE OR LOSS OF GENETIC VARIATION UNDER
... What’s good for the goose may not be good for the gander. This twist on an old proverb captures the notion of sexual antagonism. Traits that confer high fitness on geese (females) may confer low fitness on ganders (males), and vice versa. Previous theoretical studies have shown that sex-specific sel ...
... What’s good for the goose may not be good for the gander. This twist on an old proverb captures the notion of sexual antagonism. Traits that confer high fitness on geese (females) may confer low fitness on ganders (males), and vice versa. Previous theoretical studies have shown that sex-specific sel ...
Acta Biotheoretica 47: 29-40, 1999 ON THE ADAPTIVE VALUE OF
... algorithm used in the simulation does not explicitly relate sex appeal with any additional trait conferring higher fitness. An indirect confirmation of these results is that recent evidence suggest that sexual signals which somehow increase mating success induce divergence of the trait mainly due to ...
... algorithm used in the simulation does not explicitly relate sex appeal with any additional trait conferring higher fitness. An indirect confirmation of these results is that recent evidence suggest that sexual signals which somehow increase mating success induce divergence of the trait mainly due to ...
Pedigrees - s3.amazonaws.com
... recessive. (remember: the dominant traits shows if there is one or two, the recessive shows only if there are two) – If the trait is dominant, one of the parents must have the trait. – If the trait is recessive, neither parent has to have the trait because they can be heterozygous. ...
... recessive. (remember: the dominant traits shows if there is one or two, the recessive shows only if there are two) – If the trait is dominant, one of the parents must have the trait. – If the trait is recessive, neither parent has to have the trait because they can be heterozygous. ...
Preferential Sex Linkage of Sexually Selected Genes: Evidence and
... An X bias such as the one observed by Saifi & Chandra (1999) and Reinhold (1998) can be expected for several theoretical reasons, for example sexually antagonistic selection of fluctuating selection. When traits are under sexually antagonistic selection (Rice, 1984), i.e. when one sex would benefit ...
... An X bias such as the one observed by Saifi & Chandra (1999) and Reinhold (1998) can be expected for several theoretical reasons, for example sexually antagonistic selection of fluctuating selection. When traits are under sexually antagonistic selection (Rice, 1984), i.e. when one sex would benefit ...
Cockatiel Genetics
... got 25% pure normal (NN) and 50% normal split for pied (Np and pN). A word of caution about averages is in order at this point. The above expectations are only accurate for a large sampling. One clutch of four young could be far from the calculated average. If silver or fallow is substituted for pie ...
... got 25% pure normal (NN) and 50% normal split for pied (Np and pN). A word of caution about averages is in order at this point. The above expectations are only accurate for a large sampling. One clutch of four young could be far from the calculated average. If silver or fallow is substituted for pie ...
Sex and Hormones - Bakersfield College
... • Testosterone induces the development of the penis and scrotum. • Females are not exposed to high testosterone levels and their gonads develop into ovaries, the egg-producing organs. ...
... • Testosterone induces the development of the penis and scrotum. • Females are not exposed to high testosterone levels and their gonads develop into ovaries, the egg-producing organs. ...
Measuring the effect of inbreeding on reproductive success in a
... However it has been believed that during the evolutional sexual dimorphism, intralocus sexual conflicts would be resolved because males and females have some divergence requirements and mating strategies (Cox & Calsbeek 2009), recently it is known that only some loci experience the fully resolved se ...
... However it has been believed that during the evolutional sexual dimorphism, intralocus sexual conflicts would be resolved because males and females have some divergence requirements and mating strategies (Cox & Calsbeek 2009), recently it is known that only some loci experience the fully resolved se ...
Three Point Mapping in Drosophila-2 - EdSpace
... short life cycle of about 10 days at 25°C, and are also large enough to make the detection of mutations rather uncomplicated (Carlini, 2013). X-linked traits are often observed in Drosophila. X-linked recessive inheritance occurs when a gene or trait is located on the X chromosome. Females have two ...
... short life cycle of about 10 days at 25°C, and are also large enough to make the detection of mutations rather uncomplicated (Carlini, 2013). X-linked traits are often observed in Drosophila. X-linked recessive inheritance occurs when a gene or trait is located on the X chromosome. Females have two ...
Reproduction: Cetaceans.
... Reproduction in marine otters Marine otters: Poorly known: Litter size is two (smallest litter size of any otter species, but larger litter size than any marine mammal except polar bears); Breeding system likely similar to other otters, with complex linkages to social system. Breeding activity proba ...
... Reproduction in marine otters Marine otters: Poorly known: Litter size is two (smallest litter size of any otter species, but larger litter size than any marine mammal except polar bears); Breeding system likely similar to other otters, with complex linkages to social system. Breeding activity proba ...
the evolutionary dynamics of intralocus sexual conflict
... Alcock 2001). This includes time and energy costs, as well as increased risk of pathogen/parasite infection, predation, and injury. Therefore, by increasing male mating rate, this could consequently promote IRSC and therefore create positive selection for females to reduce the effects of male harass ...
... Alcock 2001). This includes time and energy costs, as well as increased risk of pathogen/parasite infection, predation, and injury. Therefore, by increasing male mating rate, this could consequently promote IRSC and therefore create positive selection for females to reduce the effects of male harass ...
PROGENI Enrollment Actual vs Projected
... •All children of a mother are at risk to be affected or carriers •An individual will be affected with a mitochondrial disorder if the percentage of mitochondria possessing mutated mtDNA reaches a threshold value beyond which the normal mtDNA does not compensate for the ...
... •All children of a mother are at risk to be affected or carriers •An individual will be affected with a mitochondrial disorder if the percentage of mitochondria possessing mutated mtDNA reaches a threshold value beyond which the normal mtDNA does not compensate for the ...
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.