About reproduction
... • Each homologous pair can orient in either of two ways at the plane of cell division. (Fig. 9.5a,b) • The total number of possible outcomes = 2n (n = number of haploid chromosomes). (Fig. 9.6) • Crossing over between homologous chromosomes at prophase I. ...
... • Each homologous pair can orient in either of two ways at the plane of cell division. (Fig. 9.5a,b) • The total number of possible outcomes = 2n (n = number of haploid chromosomes). (Fig. 9.6) • Crossing over between homologous chromosomes at prophase I. ...
self-fertilize
... F1 generation: offspring resulting from a cross of true-breeding parents F2 generation: offspring resulting from the self-fertilization of F1 plants dominant: the form of each trait expressed in the F1 plants recessive: the form of the trait not seen in the F1 plants ...
... F1 generation: offspring resulting from a cross of true-breeding parents F2 generation: offspring resulting from the self-fertilization of F1 plants dominant: the form of each trait expressed in the F1 plants recessive: the form of the trait not seen in the F1 plants ...
Incomplete Dominance and Codominance Notes
... phenotype is something in the middle (red x white = pink). In COdominance, the "recessive" & "dominant" traits appear together in the phenotype of hybrid organisms. Remember Codominance in the form of an example like this one: Black X white black & white spotted With codominance, a cross between o ...
... phenotype is something in the middle (red x white = pink). In COdominance, the "recessive" & "dominant" traits appear together in the phenotype of hybrid organisms. Remember Codominance in the form of an example like this one: Black X white black & white spotted With codominance, a cross between o ...
Meiosis notes
... • Diploidy is useful because 2 copies of every gene means that there a backup copy if one gets mutated. ◦ Mutations are very frequent in the cells of large organisms. We wouldn’t survive with just one copy of each gene. 2. The Problem of Doubling • However, new organisms arise from the merger of two ...
... • Diploidy is useful because 2 copies of every gene means that there a backup copy if one gets mutated. ◦ Mutations are very frequent in the cells of large organisms. We wouldn’t survive with just one copy of each gene. 2. The Problem of Doubling • However, new organisms arise from the merger of two ...
Complex Inheritance and Human Heredity
... Therefore, a person who is heterozygous for a characteristic may be considered a carrier for that trait since it will not be expressed. ...
... Therefore, a person who is heterozygous for a characteristic may be considered a carrier for that trait since it will not be expressed. ...
Genetics 2008
... the probability of passing along a hereditary disease is an important area of study. ...
... the probability of passing along a hereditary disease is an important area of study. ...
INHERITANCE AND VARIATION OF TRAITS UNIT FIVE: GENETICS
... studies heredity is called genetics. B. Characteristics that are inherited are called traits. C. The instructions for each trait are located on chromosomes, which are found in the nucleus of a cell. 1. The DNA on a chromosome is arranged in segments to control the making of proteins. 2. These DNA se ...
... studies heredity is called genetics. B. Characteristics that are inherited are called traits. C. The instructions for each trait are located on chromosomes, which are found in the nucleus of a cell. 1. The DNA on a chromosome is arranged in segments to control the making of proteins. 2. These DNA se ...
Chapter 15 Lecture Slides - Tanque Verde School District
... Populations, not individuals, evolve • Genes determine most of an individual’s features, such as tooth shape or flower color. • If an organism has a feature—called a phenotype in genetic terms—that is poorly adapted to its environment, the organism may be unable to survive and reproduce. • However, ...
... Populations, not individuals, evolve • Genes determine most of an individual’s features, such as tooth shape or flower color. • If an organism has a feature—called a phenotype in genetic terms—that is poorly adapted to its environment, the organism may be unable to survive and reproduce. • However, ...
The Next Generation: Part 2 Secrets Revealed
... important because we need exact copies of cells to replace old or dying cells throughout our bodies. These cells need to be exactly like their parent cells so they are able to continue doing their jobs. If offspring were produced through mitosis, as they often are in single-celled organisms, each of ...
... important because we need exact copies of cells to replace old or dying cells throughout our bodies. These cells need to be exactly like their parent cells so they are able to continue doing their jobs. If offspring were produced through mitosis, as they often are in single-celled organisms, each of ...
Biol-1406_Ch12.ppt
... • If you cross a plant with a dominant phenotype but an unknown genotype (PP or Pp) with a homozygous recessive individual (pp), the two possible genotypes will yield different results. ...
... • If you cross a plant with a dominant phenotype but an unknown genotype (PP or Pp) with a homozygous recessive individual (pp), the two possible genotypes will yield different results. ...
Multiple Choice - Effingham County Schools
... Use the following information to answer the questions below. Oompah Loompahs have orange faces, which is caused by a dominant gene (T). The recessive condition results in a lime face (t). Create Punnett Squares. 21. If two heterozygous Oompah Loompahs with orange faces are crossed: a. What is the pr ...
... Use the following information to answer the questions below. Oompah Loompahs have orange faces, which is caused by a dominant gene (T). The recessive condition results in a lime face (t). Create Punnett Squares. 21. If two heterozygous Oompah Loompahs with orange faces are crossed: a. What is the pr ...
Sexual vs. Asexual Reproduction
... Organisms have to grow and develop until they are old enough to produce sex cells Search and find a mate Searching can expose individuals to predators, diseases, or harsh environmental conditions Fertilization cannot take place during pregnancy, which can last as long as 2 years for some mammals ...
... Organisms have to grow and develop until they are old enough to produce sex cells Search and find a mate Searching can expose individuals to predators, diseases, or harsh environmental conditions Fertilization cannot take place during pregnancy, which can last as long as 2 years for some mammals ...
HO Objectives 16 17
... 6. Be able to a) explain how an allele frequency is calculated b) calculate the frequency of the r allele is half of a population of four o’clocks has red flowers and half has white flowers. 7. Be able to a) list the conditions that population must meet in order to have genetic equilibrium b) explai ...
... 6. Be able to a) explain how an allele frequency is calculated b) calculate the frequency of the r allele is half of a population of four o’clocks has red flowers and half has white flowers. 7. Be able to a) list the conditions that population must meet in order to have genetic equilibrium b) explai ...
Genetics
... unaffected offspring must be Rr heterozygotes, because they got a r allele from their affected parent. 3. If two unaffected mate and have an affected child, both parents must be Rr heterozygotes. 4. Recessive outsider rule: outsiders are those whose parents are unknown. In a recessive autosomal pedi ...
... unaffected offspring must be Rr heterozygotes, because they got a r allele from their affected parent. 3. If two unaffected mate and have an affected child, both parents must be Rr heterozygotes. 4. Recessive outsider rule: outsiders are those whose parents are unknown. In a recessive autosomal pedi ...
Genetics/Genetic Disorders, Evolution
... survive to ensure that at least some will survive long enough to reproduce & pass on genes 2. Struggle to survive (competition): more organisms than resources to go around leads to competition (for food, water, shelter, mates, light, nutrients, etc.). 3. Variation within population: there are differ ...
... survive to ensure that at least some will survive long enough to reproduce & pass on genes 2. Struggle to survive (competition): more organisms than resources to go around leads to competition (for food, water, shelter, mates, light, nutrients, etc.). 3. Variation within population: there are differ ...
dragon genetics lab
... the formation of gametes. This means that traits are transmitted to offspring independently of one another. Mendel’s Law of Segregatoin Mendel's law of segregation states that allele pairs separate or segregate during gamete formation, and randomly unite at fertilization. There are four main concept ...
... the formation of gametes. This means that traits are transmitted to offspring independently of one another. Mendel’s Law of Segregatoin Mendel's law of segregation states that allele pairs separate or segregate during gamete formation, and randomly unite at fertilization. There are four main concept ...
MEIOSIS Notes
... Why do we have meiosis? - to generate haploid gametes - to make new combinations of genes -How? random (independent) assortment ...
... Why do we have meiosis? - to generate haploid gametes - to make new combinations of genes -How? random (independent) assortment ...
Chromosomal Mapping of Ribosomal rRNA Genes in the Small
... Abstract Chromosomal location of minor (5S) and major (18-28S) ribosomal RNA genes (rDNA) were studied in the small rock oyster (Saccostrea mordax) using sequential fluorescence in situ hybridization (FISH). Metaphase chromosomes were obtained from gill tissue of adult oysters. Both minor and major ...
... Abstract Chromosomal location of minor (5S) and major (18-28S) ribosomal RNA genes (rDNA) were studied in the small rock oyster (Saccostrea mordax) using sequential fluorescence in situ hybridization (FISH). Metaphase chromosomes were obtained from gill tissue of adult oysters. Both minor and major ...
Proposal (#47) to South American Check
... where lightning will strike next. Especially as there is no set rule to how much genetic change is required for speciation - isolating mechanisms can develop quickly with rather little change in the whole genome under conditions of, say, strong sexual selection but only very slowly in other contexts ...
... where lightning will strike next. Especially as there is no set rule to how much genetic change is required for speciation - isolating mechanisms can develop quickly with rather little change in the whole genome under conditions of, say, strong sexual selection but only very slowly in other contexts ...
File
... • The offspring comprise equal numbers of purple and white plants. If some of the plants are white (pp), then the unknown genotype must be Pp. • If all the offspring of the test cross were purple, then no definite conclusions could be drawn, since both parental genotypes, (PP and Pp) are capable of ...
... • The offspring comprise equal numbers of purple and white plants. If some of the plants are white (pp), then the unknown genotype must be Pp. • If all the offspring of the test cross were purple, then no definite conclusions could be drawn, since both parental genotypes, (PP and Pp) are capable of ...
Chapter 13- Reproduction, Meiosis, and Life Cycles Many plants
... Know terms-sexual reproduction, gametes, zygote, meiosis, [haploid (N) , diploid (2N) –Fig. 13.3] Know general characteristics of sexual reproduction -meiosis is the cell division that is associated with sexual reproduction -sexual reproduction does not produce genetically identical replicas of pare ...
... Know terms-sexual reproduction, gametes, zygote, meiosis, [haploid (N) , diploid (2N) –Fig. 13.3] Know general characteristics of sexual reproduction -meiosis is the cell division that is associated with sexual reproduction -sexual reproduction does not produce genetically identical replicas of pare ...
Chapter 11: Complex Inheritance and Human Heredity • Main idea
... • An individual with Tay-Sachs disease would be identified by which symptom? A. excessive mucus production B. an enlarged liver C. a cherry-red spot on the back of the eye D.vision problems ...
... • An individual with Tay-Sachs disease would be identified by which symptom? A. excessive mucus production B. an enlarged liver C. a cherry-red spot on the back of the eye D.vision problems ...
Evolution Practice Test - Miami Beach Senior High
... 16. The accompanying diagram represents the bones of the forelimbs of two animals alive today that most likely evolved from a common ancestor. Members of the original ancestral population were isolated into two groups by natural events. If these two animals did have a common ancestor, which statemen ...
... 16. The accompanying diagram represents the bones of the forelimbs of two animals alive today that most likely evolved from a common ancestor. Members of the original ancestral population were isolated into two groups by natural events. If these two animals did have a common ancestor, which statemen ...
Hybrid (biology)
In biology a hybrid, also known as cross breed, is the result of mixing, through sexual reproduction, two animals or plants of different breeds, varieties, species or genera. Using genetic terminology, it may be defined as follows. Hybrid generally refers to any offspring resulting from the breeding of two genetically distinct individuals, which usually will result in a high degree of heterozygosity, though hybrid and heterozygous are not, strictly speaking, synonymous. a genetic hybrid carries two different alleles of the same gene a structural hybrid results from the fusion of gametes that have differing structure in at least one chromosome, as a result of structural abnormalities a numerical hybrid results from the fusion of gametes having different haploid numbers of chromosomes a permanent hybrid is a situation where only the heterozygous genotype occurs, because all homozygous combinations are lethal.From a taxonomic perspective, hybrid refers to: Offspring resulting from the interbreeding between two animal species or plant species. See also hybrid speciation. Hybrids between different subspecies within a species (such as between the Bengal tiger and Siberian tiger) are known as intra-specific hybrids. Hybrids between different species within the same genus (such as between lions and tigers) are sometimes known as interspecific hybrids or crosses. Hybrids between different genera (such as between sheep and goats) are known as intergeneric hybrids. Extremely rare interfamilial hybrids have been known to occur (such as the guineafowl hybrids). No interordinal (between different orders) animal hybrids are known. The third type of hybrid consists of crosses between populations, breeds or cultivars within a single species. This meaning is often used in plant and animal breeding, where hybrids are commonly produced and selected, because they have desirable characteristics not found or inconsistently present in the parent individuals or populations.↑ ↑ ↑ ↑