Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
The following diagram represents a two generation pedigree showing the blood groups of the individuals. The female has been married to two different individuals. O A AB Key 1st generation 1 2 Male 3 Female B O A AB 2nd generation 1 (a) 2 3 4 Define the term co-dominant alleles. See topic 4.3.1 Be aware that blood types are also an example of multiple alleles- see topic 4.3.3. Remember to use the symbols used by the IBO Ia for allele type A, dominant to i Ib for allele type B, dominant to i I for the type O allele- recessive to the other 2 alleles (1) (b) Deduce with a reason the probable father of 2nd generation-1. 2nd generation-1 refers to the first square on the leftin the bottom row. First step is to write the full genotypes for the 2nd G -1; since his mother (1st G 2) is type A and has an type O offspring, 2nd G-1 must be hetereozygous Ibi . This then in turn means that the father must have given the Ib allele and this would mean the true father must be the type_____ male. (2) (c) If 2nd generation-3 marries a man with blood group AB, predict the possible genotypes of the children. Since you know that the new husband has the genotype IaIb and the wife has Ia?, you have 2 choices. 1. if the wife is heterozygous, Ia i, then draw a punnett grid for genotypes A, B and AB. 2. if the wife is homozygous, Ia Ia, then draws the 2nd punnett grid for genotypes A and AB There are 6 marks for this, since there are two possibilities (Total 6marks) (3)