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Genetics

Genetics. Genetics. Genetics is the study of how traits are inherited in offspring. Genetics. Gene : Segment of chromosome (DNA) that codes for a trait. Genetics. Allele : Different form of the same gene. Example: Skin Color (Color, Albino). Genetics.

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Genetics

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  1. Genetics

  2. Genetics • Genetics is the study of how traits are inherited in offspring.

  3. Genetics • Gene: Segment of chromosome (DNA) that codes for a trait

  4. Genetics • Allele: Different form of the same gene. • Example: Skin Color (Color, Albino)

  5. Genetics • Humans normally have two alleles for each gene.

  6. Genetics • Dominant: Trait that gets expressed from dominant allele.

  7. Genetics • Phenotype: Observable physical or behavioral trait

  8. Genetics • Genotype: Genes (Alleles) that code for a trait

  9. Genes and Traits part 2 • Homozygous: having the same forms (alleles) for a gene on both chromosomes. • Also said to be purebred.

  10. Genetics • Homozygous Dominant = AA • Homozygous Recessive = aa

  11. Genetics • Heterozygous: having different forms (alleles) for a gene on both chromosomes. • Also said to be hybrid.

  12. Heterozygous = Aa, or aA Genetics • Monohybrid Crosses • Gene: Albinism • Dominant Allele: A = normal skin color • Recessive Allele: a = albino

  13. Heterozygous = Aa, or aA Genetics • Cross a heterozygous individual with a heterozygous individual: Aa X Aa

  14. Heterozygous = Aa, or aA Genetics • Cross a homozygous dominant individual with a homozygous recessive individual: AA X aa

  15. Heterozygous = Aa, or aA Genetics • Test Cross: Cross a homozygous recessive individual with an unknown (homozygous dominant or heterozygous): aa X A?

  16. Heterozygous = Aa, or aA Genetics • The outcome determines the offspring. If half of the offspring are albino, then the unknown is heterozygous (Aa).

  17. Heterozygous = Aa, or aA Genetics • If all of the offspring have normal skin color, then the unknown is homozygous dominant.

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