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  2. Chromosome 4 - Wikipedia

    en.wikipedia.org/wiki/Chromosome_4

    The chromosome is ~193 megabases in length. In a 2012 paper, 775 protein-encoding genes were identified on this chromosome. [4] 211 (27.9%) of these coding sequences did not have any experimental evidence at the protein level, in 2012. 271 appear to be membrane proteins. 54 have been classified as cancer-associated proteins.

  3. Cytogenetic notation - Wikipedia

    en.wikipedia.org/wiki/Cytogenetic_notation

    Symbol Description , Separates modal number (total number of chromosomes), sex chromosomes, and chromosome abnormalities -Loss of a chromosome ( ) Grouping for breakpoints and structurally altered chromosomes

  4. Pedigree collapse - Wikipedia

    en.wikipedia.org/wiki/Pedigree_collapse

    Without pedigree collapse, a person's ancestor tree is a binary tree, formed by the person, the parents (2), the grandparents (4), great-grandparents (8), and so on.. However, the number of individuals in such a tree grows exponentially and will eventually become impossibl

  5. Maternal effect - Wikipedia

    en.wikipedia.org/wiki/Maternal_effect

    In genetics, a maternal effect occurs when the phenotype of an organism is determined by the genotype of its mother. [1] For example, if a mutation is maternal effect recessive, then a female homozygous for the mutation may appear phenotypically normal, however her offspring will show the mutant phenotype, even if they are heterozygous for the mutation.

  6. Introduction to genetics - Wikipedia

    en.wikipedia.org/wiki/Introduction_to_genetics

    Genetics is the study of genes and tries to explain what they are and how they work. Genes are how living organisms inherit features or traits from their ancestors; for example, children usually look like their parents because they have inherited their parents' genes.

  7. Chromosomal crossover - Wikipedia

    en.wikipedia.org/wiki/Chromosomal_crossover

    The meiosis-specific recombinase Dmc1 and the general recombinase Rad51 coat the single-stranded DNA to form nucleoprotein filaments. [18] The recombinases catalyze invasion of the opposite chromatid by the single-stranded DNA from one end of the break. Next, the 3' end of the invading DNA primes DNA synthesis, causing displacement of the ...

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    mail.aol.com/?rp=webmail-std/en-us/basic

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  9. Pedigree chart - Wikipedia

    en.wikipedia.org/wiki/Pedigree_chart

    The word pedigree is a corruption of the Anglo-Norman French pé de grue or "crane's foot", either because the typical lines and split lines (each split leading to different offspring of the one parent line) resemble the thin leg and foot of a crane [3] or because such a mark was used to denote succession in pedigree charts.