Modes of selection: directional, balancing and disruptive RR Rr rr
... Balancing selection prevents the loss of two or more alleles at a locus, by increasing the marginal fitness of each allele as it becomes rarer. There are two principal mechanisms: -- heterozygote advantage (with fixed genotypic fitnesses) -- negative frequency dependence (with varying genotypic fitn ...
... Balancing selection prevents the loss of two or more alleles at a locus, by increasing the marginal fitness of each allele as it becomes rarer. There are two principal mechanisms: -- heterozygote advantage (with fixed genotypic fitnesses) -- negative frequency dependence (with varying genotypic fitn ...
Document
... Mendel then crossed these second generation tall pea plants and ended up with 1 out 4 being small. x ...
... Mendel then crossed these second generation tall pea plants and ended up with 1 out 4 being small. x ...
Review handout A
... What can you say about the inheritance of this trait (dominant/recessive, sex-linked/autosomal)? Autosomal recessive. Recessive because there is an affected offspring without an affected parent. It is autosomal because an X-linked trait cannot be passed to a daughter unless the father is affected (r ...
... What can you say about the inheritance of this trait (dominant/recessive, sex-linked/autosomal)? Autosomal recessive. Recessive because there is an affected offspring without an affected parent. It is autosomal because an X-linked trait cannot be passed to a daughter unless the father is affected (r ...
Lecture Outline
... a. Inferred the white-eyed phenotype was due to a mutation. b. Mated white-eyed male to red-eyed female: (1) All F1 flies had red eyes. (2) Conclusion: The white-eyed phenotype is recessive. c. Mated F1 males to F1 females: (1) F2 population 3:1 red-eyed:white-eyed flies. (2) Unusual result: All the ...
... a. Inferred the white-eyed phenotype was due to a mutation. b. Mated white-eyed male to red-eyed female: (1) All F1 flies had red eyes. (2) Conclusion: The white-eyed phenotype is recessive. c. Mated F1 males to F1 females: (1) F2 population 3:1 red-eyed:white-eyed flies. (2) Unusual result: All the ...
Population genetics and the modern synthesis of evolutionary theory
... − An individual's phenotype is the result of the interaction of both genes and environment − You can't have a phenotype without genes, and you can't have a phenotype that did not develop in some environment − both are necessarily part of the process − so the genetic processes we are looking at are n ...
... − An individual's phenotype is the result of the interaction of both genes and environment − You can't have a phenotype without genes, and you can't have a phenotype that did not develop in some environment − both are necessarily part of the process − so the genetic processes we are looking at are n ...
The ability to taste the chemical PTC is determined by a single gene
... blahblah bird produces offspring that are silver. The color of blahblah birds is determined by just two alleles. a) What are the genotypes of the parent blahblah birds in the original cross? b) What is/are the genotype(s) of the silver offspring? c) What would be the phenotypic ratios of offspring p ...
... blahblah bird produces offspring that are silver. The color of blahblah birds is determined by just two alleles. a) What are the genotypes of the parent blahblah birds in the original cross? b) What is/are the genotype(s) of the silver offspring? c) What would be the phenotypic ratios of offspring p ...
punnett square
... • A tool to predict the probability of certain traits in offspring that shows the different ways alleles can combine • A chart that shows all the possible combinations of alleles that can result when certain genes are crossed ...
... • A tool to predict the probability of certain traits in offspring that shows the different ways alleles can combine • A chart that shows all the possible combinations of alleles that can result when certain genes are crossed ...
DO NOW - PBworks
... Punnett Square – example • Top left box = Mother’s first allele, Father’s first allele • Top right box = Mother’s second allele, Father’s first allele • Bottom left box = Mother’s first allele, Father’s second allele • Bottom right box = Mother’s second allele, Father’s second allele ...
... Punnett Square – example • Top left box = Mother’s first allele, Father’s first allele • Top right box = Mother’s second allele, Father’s first allele • Bottom left box = Mother’s first allele, Father’s second allele • Bottom right box = Mother’s second allele, Father’s second allele ...
Population Genetics and Evolution LAB 8A
... 1. Creating F1- Choose another student at random (to ensure random mating). Assume that gender and genotype are irrelevant to mate selection. 2. Turn the four cards over so the letters are not showing, shuffle them, and take the card on top to contribute to the production of the first offspring. You ...
... 1. Creating F1- Choose another student at random (to ensure random mating). Assume that gender and genotype are irrelevant to mate selection. 2. Turn the four cards over so the letters are not showing, shuffle them, and take the card on top to contribute to the production of the first offspring. You ...
41) A Closer Look at Natural Selection
... 42) Directional, Disruptive, and Stabilizing Selection • Three modes of selection: 1) Directional selection favors individuals at one end of the phenotypic range 2) Disruptive selection favors individuals at both extremes of the phenotypic range 3) Stabilizing selection favors intermediate variants ...
... 42) Directional, Disruptive, and Stabilizing Selection • Three modes of selection: 1) Directional selection favors individuals at one end of the phenotypic range 2) Disruptive selection favors individuals at both extremes of the phenotypic range 3) Stabilizing selection favors intermediate variants ...
MODE OF TRANSMISSION/ PATTERNS OF INHERITENCE
... Both parents transfer alleles to their offspring Risk if both parents are affected? ...
... Both parents transfer alleles to their offspring Risk if both parents are affected? ...
Mendel and the Laws of Inheritance
... of inheritance at the time, no explanation could accurately explain heredity ...
... of inheritance at the time, no explanation could accurately explain heredity ...
apgenetics1206
... 5) Among white human beings, when individuals with straight hair mate with those with curly hair, wavy-haired children are produced. If two individuals with wavy hair mate, what phenotypes and ratios would you predict among their offspring? 6) In cocker spaniels, black color is due to a dominant gen ...
... 5) Among white human beings, when individuals with straight hair mate with those with curly hair, wavy-haired children are produced. If two individuals with wavy hair mate, what phenotypes and ratios would you predict among their offspring? 6) In cocker spaniels, black color is due to a dominant gen ...
Lecture 10 Beyond Mendel 1
... • Activity of the IA gene product, a-N-acetylgalactosamyl transferase, converts the H antigen to the A antigen. • Activity of the IB gene product, a-D-galactosyltransferase, converts the H antigen to the B antigen. • Both enzymes are present in an IAIB individual, and some H antigens will be modifie ...
... • Activity of the IA gene product, a-N-acetylgalactosamyl transferase, converts the H antigen to the A antigen. • Activity of the IB gene product, a-D-galactosyltransferase, converts the H antigen to the B antigen. • Both enzymes are present in an IAIB individual, and some H antigens will be modifie ...
One - ciese
... When Comparing our class to the overall survey of people studied, the recessive traits were still prevalent, but we had 4 recessive traits and 3 dominant traits. The overall project study showed 5 recessive and 2 dominant traits. In conclusion, the Recessive traits were prevalent. ...
... When Comparing our class to the overall survey of people studied, the recessive traits were still prevalent, but we had 4 recessive traits and 3 dominant traits. The overall project study showed 5 recessive and 2 dominant traits. In conclusion, the Recessive traits were prevalent. ...
Intrinsic Mating Barriers
... divergence of populations. But what exactly do we mean when we say that enough ‘differences’ accumulate to hinder interbreeding among different populations? Or, in other words, what types of barriers may develop within different populations to prevent successful interbreeding? In a general sense, th ...
... divergence of populations. But what exactly do we mean when we say that enough ‘differences’ accumulate to hinder interbreeding among different populations? Or, in other words, what types of barriers may develop within different populations to prevent successful interbreeding? In a general sense, th ...
Complete Paper
... time and the frequencies in the next generation will be p2 for the AA genotype, 2pq for the Aa genotype and q2 for the aa genotype. Population is in genetic equilibrium when allele frequencies in the gene pool remain constant across generations. A gene pool will be in equilibrium if the population i ...
... time and the frequencies in the next generation will be p2 for the AA genotype, 2pq for the Aa genotype and q2 for the aa genotype. Population is in genetic equilibrium when allele frequencies in the gene pool remain constant across generations. A gene pool will be in equilibrium if the population i ...
The information in this document is meant to cover topic 4 and topic
... hemophilia, both located on the X-‐chromosome. Females must be homozygous for these conditions to express the condition, as presence of the dominant allele on their second X-‐ chromosome would result in ...
... hemophilia, both located on the X-‐chromosome. Females must be homozygous for these conditions to express the condition, as presence of the dominant allele on their second X-‐ chromosome would result in ...
Heredity and How Traits Change
... • Natural selection is the process in which individuals with traits that better suit the environment are more likely to survive longer and reproduce successfully than those individuals without these traits. • An adaptation is an inherited trait that increases an organism’s chance of surviving and re ...
... • Natural selection is the process in which individuals with traits that better suit the environment are more likely to survive longer and reproduce successfully than those individuals without these traits. • An adaptation is an inherited trait that increases an organism’s chance of surviving and re ...
The Effects of a Bottleneck on Inbreeding Depression and the
... inbreeding depression and genetic load caused by deleterious mutations in an outcrossing population. The calculations assume that loci have multiplicative fitness effects and that linkage disequilibrium is negligible. Inbreeding depression decreases immediately after a sudden reduction of population ...
... inbreeding depression and genetic load caused by deleterious mutations in an outcrossing population. The calculations assume that loci have multiplicative fitness effects and that linkage disequilibrium is negligible. Inbreeding depression decreases immediately after a sudden reduction of population ...
Chapter 15 Test
... D) Tt , Short E) tt, Tall 2. Complete the Punnett Square. Pick the correct genotype and phenotype. A) TT, Tall B) tt, Short C) Tt, Tall D) Tt , Short E) tt, Tall 3. Complete the Punnett Square. Pick the correct genotype and phenotype. A) TT, Tall B) tt, Short C) Tt, Tall D) Tt , Short E) tt, Tall 4. ...
... D) Tt , Short E) tt, Tall 2. Complete the Punnett Square. Pick the correct genotype and phenotype. A) TT, Tall B) tt, Short C) Tt, Tall D) Tt , Short E) tt, Tall 3. Complete the Punnett Square. Pick the correct genotype and phenotype. A) TT, Tall B) tt, Short C) Tt, Tall D) Tt , Short E) tt, Tall 4. ...