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PowerPoint
PowerPoint

... expressed.  Dominant traits cover up or mask the alleles for recessive traits. In some organisms there are cases of co dominance of traits in which both dominant and recessive genes are expressed. Incomplete dominance happens when a blending of the allele pair is expressed.  The Punnett Square is ...
Asexual Reproduction Jigsaw
Asexual Reproduction Jigsaw

... parent cell. The nucleus of the parent cell then divides; one of the daughter nuclei migrates into the bud, and the other remains in the parent cell. The parent cellis capable of producing many buds over its surface by continuous synthesis of cytoplasm and repeated nuclear divisions. After a bud dev ...
Sources of Genetic Variation
Sources of Genetic Variation

... Triploid organisms are usually sterile. Triploidy is a common way of making seedless fruit, such as in watermelons. Recall that the seed is a multicellular organism, many cell divisions after fertilization. The reason triploids are sterile can be found in metaphase and anaphase of meiosis 1. Homolog ...
Species, Variability, and Integration
Species, Variability, and Integration

... According to Boyd, biological species are natural kinds. Boyd’s conception of natural kinds is called Homeostatic Property Cluster (henceforth, HPC) theory. HPC theory comprises, inter alia, the following two claims: (C1) There is a family (F) of properties that are contingently clustered in nature ...
- Philsci
- Philsci

... We defend a realistic attitude towards biological species. We argue that two species are not different species because they differ in intrinsic features, be they phenotypic or genomic, but because they are separated with regard to gene flow. There are no intrinsic species essences. However, there ar ...
Macroevolution Part III Sympatric Speciation
Macroevolution Part III Sympatric Speciation

... other — and this, in turn, can impact their evolution. • Many fish species, for example, have evolved vision that is specifically tuned to see well in the sort of light ...
Macroevolution Part III Sympatric Speciation
Macroevolution Part III Sympatric Speciation

... other — and this, in turn, can impact their evolution. • Many fish species, for example, have evolved vision that is specifically tuned to see well in the sort of light ...
X Chromosome
X Chromosome

... ones characteristics! - Chromosome #1-22 ...
GENETIC DIFFERENTIATION AT NUCLEAR AND
GENETIC DIFFERENTIATION AT NUCLEAR AND

... in determining the outcome of allopatric differentiation when separated populations meet again after isolation, as can be seen in some hybrid zones that are maintained by a balance between gene flow and selection against hybrids (e.g., for a recent discussion see Kruuk et al. 1999). In birds, allopa ...
Macroevolution: Part III Sympatric Speciation
Macroevolution: Part III Sympatric Speciation

... other — and this, in turn, can impact their evolution. • Many fish species, for example, have evolved vision that is specifically tuned to see well in the sort of light ...
First question is how to create chromosomes, what type of encoding
First question is how to create chromosomes, what type of encoding

...  Probabilistic transition rules are used, not deterministic. The search can proceed in any direction. ...
Test Review Sheet with Answers
Test Review Sheet with Answers

... 9. Define the following terms: Homozygous: Having 2 of the same allele for a trait. Also called pure-bred for that trait Heterozygous: Having 2 different alleles for a trait. Also called hybrid for that trait. Offspring: The next generation of organisms created from existing organisms either by ase ...
File
File

... heterozygous, half of the offspring will have the __________ phenotype. 9. In Mendel's experiments, if the gene for tall (T) plants was incompletely dominant over the gene for short (t) plants, what would be the result of crossing two Tt plants? 10. A genetic cross of inbred snapdragons with red flo ...
Document
Document

... - understand sex chromosomes, X & Y; what determines whether an organism is a boy or girl - practice presentation skills Scope of Work: Every team of two (2) students is responsible for choosing a Pokémon species. With this Pokémon species, you must create two individual Pokémon parents (of the same ...
CRL-Rodent Genetics and Genetic Quality Control for Inbred and F1
CRL-Rodent Genetics and Genetic Quality Control for Inbred and F1

... occur and must be detected by genetic monitoring. Contamination and control are best understood with the following terms and concepts in mind: The gene, or basic unit of genetic inheritance, was discovered by Gregor Mendel and named by the Danish plant geneticist Wilhelm Johannsen. Genes usually cod ...
Directed Reading B
Directed Reading B

... Read the description. Then, draw a line from the dot next to each description to the matching word. ...
Study Guide Chapter 7 Science Study Guide-CH 7
Study Guide Chapter 7 Science Study Guide-CH 7

... process can result in gene alleles actually changing from one chromosome in a pair to the other chromosome in the same pair. These natural variations during the Meiosis process increase the possible variations of Genotypes that can appear in offspring and increase the variation within the species. M ...
the Note
the Note

... written in lower case r = white. o Homozygous dominant alleles means that both genes are the same for the same dominant trait. It will be represented by RR, which represents both the genes for red flowers. The offspring will be red because two dominant genes are present. o Heterozygous alleles means ...
asexual reproduction
asexual reproduction

... allow for new, maybe unseen traits to be created.  2nd: Because we carry two copies of each gene, sometimes a trait that is bad right now will be kept in the gene pool, hidden by a more dominant form. Sometimes these traits turn out to be good later on down the road.  3rd: If the environment sudde ...
PowerPoint - New Mexico FFA
PowerPoint - New Mexico FFA

... expressed.  Dominant traits cover up or mask the alleles for recessive traits. In some organisms there are cases of co dominance of traits in which both dominant and recessive genes are expressed. Incomplete dominance happens when a blending of the allele pair is expressed.  The Punnett Square is ...
tetrad synapsis - MsOttoliniBiology
tetrad synapsis - MsOttoliniBiology

... which means they are non-sex chromosomes. In a cell, these chromosomes are paired up such that the chromosomes in each pair have the same length, centromere position, and genes controlling the same inherited characteristics. The pairs of chromosomes are called homologous chromosomes. 6) Mitosis can ...
Interactive Notebook Meiosis
Interactive Notebook Meiosis

... and animals to produce individuals with traits that they liked. This is known as selective breeding. Breeders may choose a plant or animal with traits they would like to see in the offspring. They breed that individual with another that also has those traits. For example, farmers might breed fruit t ...
Parental Genome Separation and Elimination of Cells and
Parental Genome Separation and Elimination of Cells and

...  Background and Aims The phenomenon of parental genome separation during the mitotic divisions of hybrid cells was proposed to occur under genetic control in intergeneric hybrids between cultivated Brassica species and Orychophragmus violaceus (2n = 24). To elucidate further the cytological and mol ...
Genetics
Genetics

... Mendel noticed that some plants always produced offspring that had a form of a trait exactly like the parent plant. He called these plants “purebred” plants. Mendel cross pollinated purebred plants with opposite forms of a trait. He called these plants the parental generation; or P generation. He ca ...
10 book ppt adapted 2011
10 book ppt adapted 2011

... • He studied only one trait at a time to control variables, and he analyzed his data mathematically. ...
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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.↑ ↑ ↑ ↑
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