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6F Genetics

6F Genetics. Gregor Mendel. Genetics. the study of heredity and the variation of inherited characteristics. Gene. a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring. Trait.

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6F Genetics

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  1. 6F Genetics Gregor Mendel

  2. Genetics • the study of heredity and the variation of inherited characteristics.

  3. Gene • a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

  4. Trait • Physical characteristics or attributes of an organism that are expressed by genes such as eye color, hair color, leaf shape, etc…

  5. Allele • one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.

  6. Homozygous • refers to having two of the same alleles for a single trait. • Ex: AA or aa • Both alleles are either dominant or recessive

  7. Heterozygous • refers to having two different alleles for a single trait. • Ex: Aa • One allele is dominant while the other allele is recessive

  8. Dominant Allele • an allele that produces the same phenotype whether its paired allele is identical or different • Ex: A (with a capital letter)

  9. Recessive Allele • an allele that produces its characteristic phenotype only when its paired allele is identical. • Ex: a (with a lower case letter)

  10. Genotype • the genetic makeup of an organism or group of organisms with reference to a single trait, set of traits, or an entire complex of traits. • Ex: AA, Aa or aa

  11. Phenotype • the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment. • Ex: brown eye color, blond hair color

  12. Monohybrid Cross • a genetic cross using a single trait with two alleles. • Ex: AA x aa

  13. Dihybrid Cross • In a genetic cross, a hybridization using 2 traits with 2 alleles each • Ex: AABB x aabb

  14. Dihybrid Cross

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