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Booklet Project – Genetics Review. Fold Four blank pages together The cover should say Genetics and include a definition and YOUR NAME 1. Mendelian or Simple Dominance 2. Incomplete Dominance 3. Codominance 4. Sex Linked 5. Pedigree 6. Mendel’s Laws 7. Multiple Alleles and Polygenic.

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booklet project genetics review
Booklet Project – Genetics Review
  • Fold Four blank pages together
  • The cover should say Genetics and include a definition and YOUR NAME
  • 1. Mendelian or Simple Dominance
  • 2. Incomplete Dominance
  • 3. Codominance
  • 4. Sex Linked
  • 5. Pedigree
  • 6. Mendel’s Laws
  • 7. Multiple Alleles and Polygenic
mendelian or simple dominance
Mendelian or Simple Dominance
  • Dominant: The gene whose trait shows when it is present
  • Recessive: The trait you do not see unless there are two
  • Homozygous: Two identical alleles
  • Heterozygous: Two different alleles
  • Allele: Different form of a gene
  • True-Breeding: If they self pollinate, they will have offspring identical to themselves (AA or aa)
  • Hybrid: A cross between parents with different traits (Aa)
mendelian or simple dominance1
Mendelian or Simple Dominance
  • Example:

Tall (TT) X Short (Tt)

  • Make a punnet square and tell the genotypes and phenotypes
  • 2 Alleles (T and t)
  • 3 Genotypes: TT, Tt and tt
  • 2 Phenotypes (Tall / Short)
  • Draw a picture
incomplete dominance
Incomplete Dominance
  • Genotype: The genes in an individual (TT Tt tt)
  • Phenotype: How a trait looks
  • Incomplete Dominance: The heterozygous phenotype is somewhere in between the two homozygous phenotypes (Blended or mixture) Neither allele is completely dominant.
incomplete dominance1
Incomplete Dominance
  • Example: Red parent and White parent: offspring of red, white and pink
  • RR and WW
  • Make a punnet square and tell the genotypes and phenotypes
  • 2 Alleles (R and W)
  • 3 Genotypes: RR, WW, RW
  • 3 Phenotypes Red, White, Pink
  • Draw a picture
codominance
Codominance
  • Codominance: Both alleles contribute to the phenotype (both are seen - not blended)
  • This is usually described as solid color parents with offspring that are striped or spotted
co dominance
Co Dominance
  • Example: Blood Type
  • IA, IB, and i
  • Make a punnet square and tell the genotypes and phenotypes
  • 3 Alleles (IA, IB, and i)
  • 6 Genotypes: (IAIA, IAi, IBIB, IBi, IAIB, ii)
  • 4 Phenotypes (types: A, B, AB and O)
  • Draw a picture
sex linked genes
Sex Linked Genes
  • Sex Linked Genes: Traits that are inherited through either the X or Y chromosome
  • Affect males more often because they cannot mask an X linked trait with a dominant allele
sex linked genes1
Sex Linked Genes
  • Example: Color Blindness
  • Make a punnet square and tell the genotypes and phenotypes
  • 2 Alleles (XC, Xc )
  • 4 Genotypes: XCXC,XCXc,XCY and XcY
  • 5 Phenotypes (F No Trait, F Carrier, Female with Trait, Male No Trait, and Male with Trait)
  • Draw a picture
pedigree
Pedigree
  • Pedigree: A chart that show how a trait is inherited in a family.
  • Example: Simple Inheritance
pedigree1
Pedigree
  • Sex Linked Chart
  • Males more often affected
mendel s laws
Mendel’s Laws
  • 1. The Law of Segregation: Each gamete gets only one copy of a gene
  • 2. Independent Assortment: Different traits are inherited separately
multiple alleles
Multiple Alleles
  • Multiple alleles means that more than two alleles can exist in a population, however each individual still only has two alleles for that trait
polygenic trait
Polygenic Trait
  • Some traits are controlled by more than one gene
  • Examples: Eye color and skin color
  • This explains the wide variation in eye and skin color
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