Lab_36_old - PCC - Portland Community College
... different loci acting in tandem • Results in continuous phenotypic variation between two extremes • Examples: skin color, eye color, and height • Although we think of eye color as simple dominant/recessive, there are many genes that code for eye color, which is why your eyes are not usually the exac ...
... different loci acting in tandem • Results in continuous phenotypic variation between two extremes • Examples: skin color, eye color, and height • Although we think of eye color as simple dominant/recessive, there are many genes that code for eye color, which is why your eyes are not usually the exac ...
genetics
... • The F1 generation must have within it the trait from the original parents - the white trait • The F2 generation displayed the “hidden” trait, 1/4 of the F2 generation had it (he later called this hidden trait the recessive trait) • Each individual has two "factors" that determine what external app ...
... • The F1 generation must have within it the trait from the original parents - the white trait • The F2 generation displayed the “hidden” trait, 1/4 of the F2 generation had it (he later called this hidden trait the recessive trait) • Each individual has two "factors" that determine what external app ...
Document
... The two factor cross. Example: color and shape of peas. F1 cross to produce the F2 generation Ex RRYY x rryy Round yellow mated with wrinkled green • Offspring would all be hybrid for both traits (RrYy) ...
... The two factor cross. Example: color and shape of peas. F1 cross to produce the F2 generation Ex RRYY x rryy Round yellow mated with wrinkled green • Offspring would all be hybrid for both traits (RrYy) ...
Principles of Heredity
... Adding this Class • Both sections of this class are currently full. • A lottery will be held for any spaces that become open during the first week of class. • To participate in the lottery, put your name, phone number or email address and preferred lab section on an index card and submit it to the i ...
... Adding this Class • Both sections of this class are currently full. • A lottery will be held for any spaces that become open during the first week of class. • To participate in the lottery, put your name, phone number or email address and preferred lab section on an index card and submit it to the i ...
Genetic algorithm
... possible. The evolution usually starts from a population of randomly generated individuals and happens in generations. In each generation, the fitness of every individual in the population is evaluated, multiple individuals are stochastically selected from the current population (based on their fitn ...
... possible. The evolution usually starts from a population of randomly generated individuals and happens in generations. In each generation, the fitness of every individual in the population is evaluated, multiple individuals are stochastically selected from the current population (based on their fitn ...
By Lydia Bosman, MSc (Agric), and Rulien Grobler, BSc (Agric),
... of the animal, and at each site – or locus – the animal will have two versions of each gene. If these two versions of the gene are identical, the animal is said to be homozygous at that specific locus, while an animal with two different gene versions is heterozygous. Many different versions – or all ...
... of the animal, and at each site – or locus – the animal will have two versions of each gene. If these two versions of the gene are identical, the animal is said to be homozygous at that specific locus, while an animal with two different gene versions is heterozygous. Many different versions – or all ...
Hardy-Weinberg Problem Set
... independently of the ABO blood type alleles. In humans, Rh+ individuals have the Rh antigen on their red blood cells, while Rh− individuals do not. There are two different alleles for the Rh factor known as Rh+ and rh. Assume that a dominant gene Rh produces the Rh+ phenotype, and that the recessive ...
... independently of the ABO blood type alleles. In humans, Rh+ individuals have the Rh antigen on their red blood cells, while Rh− individuals do not. There are two different alleles for the Rh factor known as Rh+ and rh. Assume that a dominant gene Rh produces the Rh+ phenotype, and that the recessive ...
Chromosome Variations
... a. Bill has 47 chromosomes. b. Betty has 47 chromosomes. c. Bill and Betty’s children have 47 chromosomes. d. Bill’s sister has 45 chromosomes. e. Bill has 46 chromosomes. f. Betty has 45 chromosomes. g. Bill’s brother has 45 chromosomes. **9. In mammals, sex chromosome aneuploids are more common th ...
... a. Bill has 47 chromosomes. b. Betty has 47 chromosomes. c. Bill and Betty’s children have 47 chromosomes. d. Bill’s sister has 45 chromosomes. e. Bill has 46 chromosomes. f. Betty has 45 chromosomes. g. Bill’s brother has 45 chromosomes. **9. In mammals, sex chromosome aneuploids are more common th ...
Effects of linkage on response to directional selection from new
... as a typical value. Thus combinations of A and crs could be chosen to satisfy (5); for example with crs = (M, A = 04 mutations are expected each generation. Method of selection. The fitness of an individual was computed as g = 1 +2.Sj-fi where Y,s} is the sum of selective values over loci and chromo ...
... as a typical value. Thus combinations of A and crs could be chosen to satisfy (5); for example with crs = (M, A = 04 mutations are expected each generation. Method of selection. The fitness of an individual was computed as g = 1 +2.Sj-fi where Y,s} is the sum of selective values over loci and chromo ...
7 POPULATION GENETICS
... become fixed (frequency=1) unless it is opposed by mutation pressure (in which case it will have a frequency close to, but slightly less than 1). However, if the heterozygote fitness is greater than the fitness of either homozygote, both alleles will be maintained at high frequency by selection. In ...
... become fixed (frequency=1) unless it is opposed by mutation pressure (in which case it will have a frequency close to, but slightly less than 1). However, if the heterozygote fitness is greater than the fitness of either homozygote, both alleles will be maintained at high frequency by selection. In ...
Genetics introduction
... •Genotype of each parent? •What is the genotypic ratio? •What is the phenotypic ratio? •What percentage of the F1 generation will have a heterozygous genotype? •What is the probability that the 5th puppy will have a pink nose? ...
... •Genotype of each parent? •What is the genotypic ratio? •What is the phenotypic ratio? •What percentage of the F1 generation will have a heterozygous genotype? •What is the probability that the 5th puppy will have a pink nose? ...
Genetics
... Some alleles are dominant, others are recessive. • If an organism has at least allele for a trait, it will exhibit the dominant trait. • If an organism has a ...
... Some alleles are dominant, others are recessive. • If an organism has at least allele for a trait, it will exhibit the dominant trait. • If an organism has a ...
Alan Robertson
... depression, and are expected to be negatively genetically correlated with other major components of fitness. ALANROBERTSON was intrigued by the fact that the population means of quantitative traits were stable. He evaluated the hypothesis that this stability was a consequence of an intermediate opti ...
... depression, and are expected to be negatively genetically correlated with other major components of fitness. ALANROBERTSON was intrigued by the fact that the population means of quantitative traits were stable. He evaluated the hypothesis that this stability was a consequence of an intermediate opti ...
introduction to genetics
... exchange of chromosomal segments between a pair of homologous chromosomes during prophase I ...
... exchange of chromosomal segments between a pair of homologous chromosomes during prophase I ...
Ch8IntrotoGenetics
... Beyond Dominant and Recessive Alleles Genetics is more complicated Some alleles are neither dominant ...
... Beyond Dominant and Recessive Alleles Genetics is more complicated Some alleles are neither dominant ...
Chapter 14
... Union (PP X pp) can only produce Pp (heterozygous) offspring in F1 generation P dominant, so all have purple flowers ...
... Union (PP X pp) can only produce Pp (heterozygous) offspring in F1 generation P dominant, so all have purple flowers ...
Simulating Random Events in Evolution: Genetic Drift, Founder
... The Vertebrate Evolution unit studied the results of evolution. In that context, we considered changes in both traits and DNA for evidence of evolutionary change and evolutionary relationships. The current unit on Islands focuses instead on the mechanisms producing observed evolutionary change. We l ...
... The Vertebrate Evolution unit studied the results of evolution. In that context, we considered changes in both traits and DNA for evidence of evolutionary change and evolutionary relationships. The current unit on Islands focuses instead on the mechanisms producing observed evolutionary change. We l ...
Polymorphism (biology)
Polymorphism in biology is said to occur when two or more clearly different phenotypes exist in the same population of a species—in other words, the occurrence of more than one form or morph. In order to be classified as such, morphs must occupy the same habitat at the same time and belong to a panmictic population (one with random mating).Polymorphism as described here involves morphs of the phenotype. The term is also used somewhat differently by molecular biologists to describe certain point mutations in the genotype, such as SNPs (see also RFLPs). This usage is not discussed in this article.Polymorphism is common in nature; it is related to biodiversity, genetic variation and adaptation; it usually functions to retain variety of form in a population living in a varied environment. The most common example is sexual dimorphism, which occurs in many organisms. Other examples are mimetic forms of butterflies (see mimicry), and human hemoglobin and blood types.According to the theory of evolution, polymorphism results from evolutionary processes, as does any aspect of a species. It is heritable and is modified by natural selection. In polyphenism, an individual's genetic make-up allows for different morphs, and the switch mechanism that determines which morph is shown is environmental. In genetic polymorphism, the genetic make-up determines the morph. Ants exhibit both types in a single population.Polymorphism also refers to the occurrence of structurally and functionally more than two different types of individuals, called zooids within the same organism. It is a characteristic feature of Cnidarians.For example, in Obelia there are feeding individuals, the gastrozooids; the individuals capable of asexual reproduction only, the gonozooids, blastostyles and free-living or sexually reproducing individuals, the medusae.