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  2. Punnett square - Wikipedia

    en.wikipedia.org/wiki/Punnett_square

    Heterozygosity, with hetero associated with different, can only be 'Aa' (the capital letter is always presented first by convention). The phenotype of a homozygous dominant pair is 'A', or dominant, while the opposite is true for homozygous recessive. Heterozygous pairs always have a dominant phenotype. [11]

  3. Gene nomenclature - Wikipedia

    en.wikipedia.org/wiki/Gene_nomenclature

    Each bacterial gene is denoted by a mnemonic of three lower case letters which indicate the pathway or process in which the gene-product is involved, followed by a capital letter signifying the actual gene. In some cases, the gene letter may be followed by an allele number. All letters and numbers are underlined or italicised.

  4. Zygosity - Wikipedia

    en.wikipedia.org/wiki/Zygosity

    The words homozygous, heterozygous, and hemizygous are used to describe the genotype of a diploid organism at a single locus on the DNA. Homozygous describes a genotype consisting of two identical alleles at a given locus, heterozygous describes a genotype consisting of two different alleles at a locus, hemizygous describes a genotype consisting of only a single copy of a particular gene in an ...

  5. Genotype - Wikipedia

    en.wikipedia.org/wiki/Genotype

    An uppercase letter is typically used to represent the dominant allele, and a lowercase letter is used to represent the recessive allele. The possible genotypes of the offspring can then be determined by combining the parent genotypes. [10] In the example on the right, both parents are heterozygous, with a genotype of Bb.

  6. 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 ...

  7. Locus (genetics) - Wikipedia

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

    Diploid and polyploid cells whose chromosomes have the same allele at a given locus are called homozygous with respect to that locus, while those that have different alleles at a given locus are called heterozygous. [3] The ordered list of loci known for a particular genome is called a gene map.

  8. Hair type chart: How to find your hair type, from straight 1A ...

    www.aol.com/lifestyle/hair-type-chart-hair-type...

    What do the letters mean on the hair type chart? Now that you know the four types of hair, we'll break down the subcategories within those types. Straight hair. 1A: ...

  9. List of irregularly spelled English names - Wikipedia

    en.wikipedia.org/wiki/List_of_irregularly...

    This list does not include place names in the United Kingdom or the United States, or places following spelling conventions of non-English languages. For UK place names, see List of irregularly spelled places in the United Kingdom. For US place names, see List of irregularly spelled places in the United States.