When genes are located on different chromosomes, they are assorted independent of one another. An AaBb individual, for example, gives rise to gamete AB, Ab, aB, and ab in equal proportions (25% each) because the chromosomes on which the genes are located are assorted independently during meiosis.PowerPoint PresentationSlide 3Slide 4Slide 5In the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.Slide 7Slide 8Slide 9Slide 10Slide 11Slide 12Slide 13Slide 14Slide 15Slide 16When genes reside on the same chromosome, they are said to be linked (not to be confused with sex linkage); therefore, as the chromosomes go, so go the genesSlide 18Slide 19Slide 20Slide 21In the cross AaBb x aabb where the heterozygous/heterozygous individual has the dominant alleles on one chromosome and the recessive alleles on the other and there is no crossing over, only two phenotypes will be produced - Dom/Dom and Rec/RecSlide 23Slide 24Slide 25Slide 26Slide 27Slide 28Slide 29Slide 30Slide 31Slide 32Slide 33Slide 34Slide 35Slide 36In the cross AaBb X aabb where the heterozygous/heterozygous individual has the dominant alleles on one chromosome and the recessive alleles on the other and there is crossing over with a 17% recombination frequency, all four phenotypes will be produced, but 83% will be parental-type (Dom/Dom and Rec/Rec) and 17% will be recombinants (Dom/Rec and Rec/Dom)Slide 38Slide 39Slide 40Slide 41Slide 42Slide 43Slide 44Slide 45Slide 46Slide 47Slide 48Slide 49When genes are located on different chromosomes, they are assorted independent of one another.An AaBb individual, for example, gives rise to gamete AB, Ab, aB, and ab in equal proportions (25% each) because the chromosomes on which the genes are located are assorted independently during meiosis.A Ba bA Ba bA Ba bA Ba bORMeiosis IA Ba bA Ba bA Ba bA Ba bORA BA Ba ba bA bA b Ba BaMeiosis IMeiosis IIA Ba bA Ba bA Ba bA Ba bORA BA Ba ba bA bA b Ba BaA BA Ba ba bA b bA Ba a BMeiosis IMeiosis II25% AB25% abA Ba bA Ba bA Ba bA Ba bORA BA Ba ba bA bA b Ba BaA BA Ba ba bA b bA Ba a B25% Ab25% aBIn the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.In the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.25%ABIn the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.25% 25%AB AbIn the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.25% 25% 25%AB Ab aBIn the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.25% 25% 25% 25%AB Ab aB abIn the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.25% 25% 25% 25%AB Ab aB ab100% abIn the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.25% 25% 25% 25%AB Ab aB ab100% abIn the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.25% 25% 25% 25%AB Ab aB ab100% ab 25% AaBbDom/DomIn the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.25% 25% 25% 25%AB Ab aB ab100% ab 25% AaBbDom/Dom 25% AabbDom/RecIn the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.25% 25% 25% 25%AB Ab aB ab100% ab 25% AaBbDom/Dom 25% AabbDom/Rec 25% aaBbRec/DomIn the cross AaBb x aabb, therefore, an equal proportion of the four possible phenotypes will be produced if A is dominant to a and B is dominant to b.25% 25% 25% 25%AB Ab aB ab100% ab 25% AaBbDom/Dom 25% AabbDom/Rec 25% aaBbRec/Dom 25% aabbRec/RecWhen genes reside on the same chromosome, they are said to be linked (not to be confused with sex linkage); therefore, as the chromosomes go, so go the genesA Ba bA Ba bHeterozygous/HeterozygousWith No Crossing OverMeiosis IA Ba bA Ba bHeterozygous/HeterozygousWith No Crossing OverA BA Ba ba ba ba bA BA BMeiosis IMeiosis IIA Ba bA Ba bHeterozygous/HeterozygousWith No Crossing OverA BA Ba ba bMeiosis IMeiosis II50% A B50% a bA Ba bA Ba bHeterozygous/HeterozygousWith No Crossing OverA BA Ba ba ba ba bA BA BIn the cross AaBb x aabb where the heterozygous/heterozygous individual has the dominant alleles on one chromosome and the recessive alleles on the other and there is no crossing over, only two phenotypes will be produced - Dom/Dom and Rec/Rec50% A B In the cross AaBb x aabb where the heterozygous/heterozygous individual has the dominant alleles on one chromosome and the recessive alleles on the other and there is no crossing over, only two phenotypes will be produced - Dom/Dom and Rec/Rec50% 50% A B a b In the cross AaBb x aabb where the heterozygous/heterozygous individual has the dominant alleles on one chromosome and the recessive alleles on the other and there is no crossing over, only two phenotypes will be produced - Dom/Dom and Rec/Rec100% a bIn the cross AaBb x aabb where the heterozygous/heterozygous individual has the dominant alleles on one chromosome and the recessive alleles on the other and there is no crossing over, only two phenotypes will be produced - Dom/Dom and Rec/Rec 50% 50% A B a b100% a bIn the cross AaBb x aabb where the heterozygous/heterozygous individual has the dominant alleles on one chromosome and the recessive alleles on the other and there is no crossing over, only two phenotypes will be produced - Dom/Dom and Rec/Rec 50% 50% A B a b100% a b50% A a B b Dom/DomIn the cross AaBb x aabb where the heterozygous/heterozygous individual has the dominant alleles on one chromosome and the recessive alleles on the other and there is no crossing over, only two phenotypes will be produced - Dom/Dom and Rec/Rec 50% 50% A B a b100% a b50% a a b b Rec/RecIn the cross AaBb x