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  2. Three-point cross - Wikipedia

    en.wikipedia.org/wiki/Three-point_cross

    In genetics, a three-point cross is used to determine the loci of three genes in an organism's genome. An individual heterozygous for three mutations is crossed with a homozygous recessive individual, and the phenotypes of the progeny are scored.

  3. Gene orders - Wikipedia

    en.wikipedia.org/wiki/Gene_orders

    Gene order is the permutation of genome arrangement. A fair amount of research has been done trying to determine whether gene orders evolve according to a molecular clock (molecular clock hypothesis) or in jumps (punctuated equilibrium). By comparing gene orders in dissimilar organisms, scientists are able to develop a molecular phylogeny tree. [1]

  4. Coefficient of coincidence - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_coincidence

    In genetics, the coefficient of coincidence (c.o.c.) is a measure of interference in the formation of chromosomal crossovers during meiosis. It is generally the case that, if there is a crossover at one spot on a chromosome, this decreases the likelihood of a crossover in a nearby spot. [1] This is called interference.

  5. Gene prediction - Wikipedia

    en.wikipedia.org/wiki/Gene_prediction

    Ab Initio gene prediction is an intrinsic method based on gene content and signal detection. Because of the inherent expense and difficulty in obtaining extrinsic evidence for many genes, it is also necessary to resort to ab initio gene finding, in which the genomic DNA sequence alone is systematically searched for certain tell-tale signs of protein-coding genes.

  6. Punnett square - Wikipedia

    en.wikipedia.org/wiki/Punnett_square

    However, a tree produces the same result as a Punnett square in less time and with more clarity. The example below assesses another double-heterozygote cross using RrYy x RrYy. As stated above, the phenotypic ratio is expected to be 9:3:3:1 if crossing unlinked genes from two double-heterozygotes.

  7. Crossover (evolutionary algorithm) - Wikipedia

    en.wikipedia.org/wiki/Crossover_(evolutionary...

    A point on both parents' chromosomes is picked randomly, and designated a 'crossover point'. Bits to the right of that point are swapped between the two parent chromosomes. This results in two offspring, each carrying some genetic information from both parents.

  8. Test cross - Wikipedia

    en.wikipedia.org/wiki/Test_cross

    In a test cross, the individual in question is bred with another individual that is homozygous for the recessive trait and the offspring of the test cross are examined. [2] Since the homozygous recessive individual can only pass on recessive alleles, the allele the individual in question passes on determines the phenotype of the offspring. [3]

  9. Comparative genomics - Wikipedia

    en.wikipedia.org/wiki/Comparative_genomics

    In comparative genomics, synteny is the preserved order of genes on chromosomes of related species indicating their descent from a common ancestor.Synteny provides a framework in which the conservation of homologous genes and gene order is identified between genomes of different species. [9]

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