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Genetics
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Genetics Genetics is the study of how traits are inherited in offspring.
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Genetics Gene: Segment of chromosome (DNA) that codes for a trait
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Genetics Allele: Different form of the same gene.
Example: Skin Color (Color, Albino)
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Genetics Humans normally have two alleles for each gene.
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Genetics Dominant: Trait that gets expressed from dominant allele.
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Genetics Phenotype: Observable physical or behavioral trait
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Genetics Genotype: Genes (Alleles) that code for a trait
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Genes and Traits part 2 Homozygous: having the same forms (alleles) for a gene on both chromosomes. Also said to be purebred.
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Genetics Homozygous Dominant = AA Homozygous Recessive = aa
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Genetics Heterozygous: having different forms (alleles) for a gene on both chromosomes. Also said to be hybrid.
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Genetics Monohybrid Crosses Gene: Albinism
Heterozygous = Aa, or aA Genetics Monohybrid Crosses Gene: Albinism Dominant Allele: A = normal skin color Recessive Allele: a = albino
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Heterozygous = Aa, or aA Genetics Cross a heterozygous individual with a heterozygous individual: Aa X Aa A a AA Aa aa
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Heterozygous = Aa, or aA Genetics Cross a homozygous dominant individual with a homozygous recessive individual: AA X aa A a Aa
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Heterozygous = Aa, or aA Genetics Test Cross: Cross a homozygous recessive individual with an unknown (homozygous dominant or heterozygous): aa X A? A ? a Aa A?
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Heterozygous = Aa, or aA Genetics The outcome determines the offspring. If half of the offspring are albino, then the unknown is heterozygous (Aa). A a Aa aa
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Heterozygous = Aa, or aA Genetics If all of the offspring have normal skin color, then the unknown is homozygous dominant. A a Aa
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