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OBJ: explain the principle of independent assortment. Explain how Mendel’s Principles apply to all organisms. KEY TERMS Independent assortment incomplete dominance codominance multiple alleles polygenic traits . DO NOW .

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Do now

OBJ: explain the principle of independent assortment. Explain how Mendel’s Principles apply to all organisms.

KEY TERMS

Independent assortment incomplete dominance codominance multiple alleles

polygenic traits

DO NOW

Create a Punnett Square for a father who is homozygous recessive for tall gene and a mother who is heterozygous. What percent of their offspring will be tall?


Independent assortment
Independent Assortment Explain how Mendel’s Principles apply to all organisms.

  • Two factor cross F1 and F2

  • Wanted to know if the recessive traits and dominant traits would group back together

  • The F2 generation of Mendel’s two factor cross produced seeds of both parents phenotypes as well as a large portion with mixed phenotypes

  • Alleles for the different traits segregated independently, known as independent assortment.


Independent assortment cont
Independent Assortment (cont) Explain how Mendel’s Principles apply to all organisms.

  • The principle of independent assortment states genes for different traits can segregate independently during the formation of gametes.

  • Helps account for the many genetic variations observed in plants, animals, and other organisms.


Mendel s principles
Mendel’s Principles Explain how Mendel’s Principles apply to all organisms.

  • The inhertiance of biological characteristics is determined by individual units known as genes. Genes are passed from parent to offspring.

  • In cases in which two or more forms (alleles) of the gene for a single trait exist, some forms of the gene may be dominant and others may be recessive.


Mendel s principles1
Mendel’s Principles Explain how Mendel’s Principles apply to all organisms.

  • In most sexually reproducing organisms, each adult has two copies for each gene- one from each parent. These genes are segregated from each other when gametes are formed.

  • The alleles for different genes usually segregate independently from one another.


Not dominant or recessive
Not Dominant or Recessive Explain how Mendel’s Principles apply to all organisms.

  • Incomplete dominance

    • Neither trait is dominant over the other

    • Heterozygous phenotype is a combination of the two homozygous


Codominance
Codominance Explain how Mendel’s Principles apply to all organisms.

  • Both alleles contribute to the phenotype

  • Both traits appear separately on the organism


Multiple alleles
Multiple alleles Explain how Mendel’s Principles apply to all organisms.


Polygenic traits
Polygenic Traits Explain how Mendel’s Principles apply to all organisms.


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