Ch 11 The Basic Principles of Heredity pg 5

Ch 11 The Basic Principles of Heredity pg 5 - anticipate...

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a. Test cross- an individual of unknown genotype is crossed with a homozygous recessive individual ex. A test cross is used to determine the genotype of a black guinea pig (Page 241) b. Mendel’s hypothesis: F1 heterozygous generation + homozygous recessive = 1:1 Tt=tall tt=short T T T Tt Tt T Tt Tt 1 : 1 c. 1:1 test-cross phenotypic ratio d. Test cross provided evidence that there is 1:1 segregation of alleles of a heterozygous parent. Principle of segregation helped Mendel
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Unformatted text preview: anticipate the ratio. VI. A dihybrid cross involves individuals that have different alleles at two loci A. Monohybrid cross- pair of alleles of a single locus Dihybrid cross- different alleles at two loci PARENTAL GENERATION: Homozygous, black, short haired BBSS : homozygous, brown, long haired bbss BBSS produces BS and bbss produces bs F1 generation: BbSs = heterozygous for hair color and length & phenotypically black and short haired...
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Ch 11 The Basic Principles of Heredity pg 5 - anticipate...

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