Answers
2. Brown eyes is dominant to blue eyes.so the person with blue eyes must have both the alleles for blue eyes that is "bb".The brown eye man either have BB or Bb allele.To determine the exact one we need to find his father eyes.As given mother eyes is blue so mother has bb allele now his father either have BB or Bb which is brown. Now ckearly we can tell that the person has Bb allele which creat brown eye.
3.We know that haemophilia is a x linked recessive trait. That means when a girl get two of the haemophilic allele she develops haemophilia if she get one allele then she is a carrier because girl has the genotype of xx.Now for Boy is he gets one allele from his mother he will be haemophilic othereise he is normal.Boy can never be a carrier. If a girl is a carrier she doesnot develop any symptoms of it .She can only be identified after a test.
Now in wir case of mother. She is a allele in one of his x carries of haemo- chromosome ailele - Philic we hero genotype is x Xe u ll NOW tros! Xhx 02 10 ? w ord nina Wow seoond thx Xnx Xuy X - Punnet souare XXX By this punnet souane it is clean that there will nor los 20 any haemophilia in the girl child- As it is x linked reessive trait, so to occur in giol the two haemophilic gene must be presen so there is 100t. Probability of gins not to be haemophilic
E. what / of the offspring should have bwe eyes. R - Brown eyes (B) Dominant to bue eyes (y) Now the woman has bue eyes that means both the aue le of the woman must have to be abbr that is homo lygous. If the female han one allele e- brown eyes that is B, she has a brown eye an B is dominant over b. Now the mother of the woman than bue eyes hence her genotype must be bb".
Any "B" aluele would make it brown eyes. Now the man has so that he must have the dominant aller or auele. If he has tooo evo will have to be brown either Bb abbi" Bue eyes BB" both one dominant aluele his to Now mate To exactly determine the we have to know the genoppe genotype of his meor fathen.