Chromosome pair 23 is the XY or sex chromosome
Chromosome pairs 1 through 22 are called "autosomal"
If number of traits exceeds number of chromosome pairs
Then more than one gene per chromosome (linkage)
dihybrid normal |
dihybrid linked |
monohybrid pleiotropic |
||||||
offspring | offspring 5% crossover |
offspring | ||||||
genotype | count | phenotype | prob | prob | prob | |||
AABB | 1 | type A type B |
6.25% | 22.56% | 25% | |||
AABb | 2 | type A hybrid B |
12.5% | 2.38% | 0 | |||
AaBB | 2 | hybrid A type B |
12.5% | 2.38% | 0 | |||
AaBb | 4 | hybrid A hybrid B |
25.0% | 45.25% | 50% | |||
AAbb | 1 | type A type b |
6.25% | 0.06% | 0 | |||
Aabb | 2 | hybrid A type b |
12.5% | 2.38% | 0 | |||
aaBB | 1 | type a type B |
6.25% | 0.06% | 0 | |||
aaBb | 2 | type a hybrid B |
12.5% | 2.38% | 0 | |||
aabb | 1 | type a type b |
6.25% | 22.56% | 25% |
RETURN TO OUTLINE
© 2004 Prof. LaFrance, Ancilla College