1 answer

Consider blue eyes (b) in humans to be recessive to brown eyes (B). Show the genotypes...

Question:

consider blue eyes (b) in humans to be recessive to brown eyes (B). Show the genotypes of a -eyed woman and a brown-eyed man
consider blue eyes (b) in humans to be recessive to brown eyes (B). Show the genotypes of a -eyed woman and a brown-eyed man whose mother had blue eyes. In a Punnett square show the genotypes of the expected offspring of the man and woman. Indicate the genotype ratio of the offspring. What percentage of the offspring should have blue eyes? (2 points) hat percentagoffspring of the other had blues (B). Show the offspring shound womano e in a pune genotypes 3. Two parents consult a genetic counsellor. They do not understand why all of their sons have haemophilia (a sex-linked trait that causes a bleeding disorder) but none of their daughters have haemophilia. Both of the parents are normal. Use a Punnett square to support how would explain this to the parents (2 points)

Answers

But according to thestion Ponents one normal. So that of father is normal then his genotype is xy. e he has the allele he is2. 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.

2 Consider Bwe eyes (6) in homoms to be necessive to brown eyes (B).</p><p>Show the genotypes of a Blue eyes womom sa Brown eyld mahic o his mother has bwe eyes Now Gorner of mani bb Father of (man) Bb/ BB On ® ® BB/ Bb b b Bb Bb Bb Brown → BOOM Brown eyer& The genotype ratio id will belon 2 Bb : 2 bbs 101 blaves Brown eve eyes i chance that offspring should have 501 of the bl

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.

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