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  2. Punnett square - Wikipedia

    en.wikipedia.org/wiki/Punnett_square

    A Punnett square showing a typical test cross. (green pod color is dominant over yellow for pea pods [1] in contrast to pea seeds, where yellow cotyledon color is dominant over green [2]). Punnett squares for each combination of parents' colour vision status giving probabilities of their offsprings' status, each cell having 25% probability in ...

  3. Pedigree chart - Wikipedia

    en.wikipedia.org/wiki/Pedigree_chart

    When a pedigree shows a condition appearing in a 50:50 ratio between men and women, it is considered autosomal. When the condition predominantly affects males in the pedigree, it is considered x-linked. [6] Some examples of dominant traits include male baldness, astigmatism, and dwarfism. Some examples of recessive traits include small eyes ...

  4. Test cross - Wikipedia

    en.wikipedia.org/wiki/Test_cross

    Under the law of dominance in genetics, an individual expressing a dominant phenotype could contain either two copies of the dominant allele (homozygous dominant) or one copy of each dominant and recessive allele (heterozygous dominant). [1] By performing a test cross, one can determine whether the individual is heterozygous or homozygous ...

  5. File:Autosomal Dominant Pedigree Chart.svg - Wikipedia

    en.wikipedia.org/wiki/File:Autosomal_Dominant...

    Autosomal dominant pedigree chart. In Autosomal Dominance the chance of receiving and expressing a particular gene is 50% regardless of the sex of parent or child. Date: 22 July 2006: Source: Own work: Author: Jerome Walker: Permission (Reusing this file)

  6. Dihybrid cross - Wikipedia

    en.wikipedia.org/wiki/Dihybrid_cross

    Dihybrid crosses are easily visualized using a 4 x 4 Punnett square. In these squares, the dominant traits are uppercase, and the recessive traits of the same characteristic is lowercase. In the following case the example of pea plant seed is chosen. The two characteristics being compared are; Shape: round or wrinkled (Round (R) is dominant)

  7. Hereditary carrier - Wikipedia

    en.wikipedia.org/wiki/Hereditary_carrier

    Punnett square: If the other parent does not have the recessive genetic disposition, it does not appear in the phenotype of the children, but on the average 50% of them become carriers. A hereditary carrier ( genetic carrier or just carrier ), is a person or other organism that has inherited a recessive allele for a genetic trait or mutation ...

  8. Lethal allele - Wikipedia

    en.wikipedia.org/wiki/Lethal_allele

    Punnett square for the agouti gene in mice, demonstrating a recessive lethal allele. [2] Lethal alleles were first discovered by Lucien Cuénot in 1905 while studying the inheritance of coat colour in mice. The agouti gene in mice is largely responsible for determining coat colour. The wild-type allele produces a blend of yellow and black ...

  9. Dominance (genetics) - Wikipedia

    en.wikipedia.org/wiki/Dominance_(genetics)

    Autosomal dominant and autosomal recessive inheritance, the two most common Mendelian inheritance patterns. An autosome is any chromosome other than a sex chromosome.. In genetics, dominance is the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome.

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