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Haemophilic female marries normal male, the theoretical ratio of their offsprings regarding hemophilia will be
- a)all offsprings are haemophilic
- b)all girls are haemophilic
- c)all sons are haemophilic
- d)half daughters and half sons are haemophilic
Correct answer is option 'C'. Can you explain this answer?
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Haemophilic female marries normal male, the theoretical ratio of thei...
The correct answer is option 'C': all sons are haemophilic.
Explanation:
When a haemophilic female marries a normal male, there are certain genetic factors that need to be considered in order to determine the likelihood of their offspring inheriting hemophilia.
1. Hemophilia is a sex-linked recessive disorder that is carried on the X chromosome. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY).
2. If a female is haemophilic, it means that both of her X chromosomes carry the hemophilia gene. Since the male only has one X chromosome, he is not a carrier of the hemophilia gene.
3. When the female haemophilic marries a normal male, there are two possible genotypes for the female: XhXh (haemophilic) or XhX (carrier). The male genotype is XY.
4. The possible genotypes for their offspring are as follows:
- Female offspring: XhXh (haemophilic) or XhX (carrier)
- Male offspring: XY (normal)
5. Since the male offspring only receives the Y chromosome from the father, they will not inherit the hemophilia gene. Therefore, all sons of a haemophilic female and normal male will be haemophilia-free.
6. However, all daughters of a haemophilic female and normal male have a 50% chance of being haemophilic (XhXh) and a 50% chance of being carriers (XhX). This is because the daughters receive one X chromosome from the mother (which carries the hemophilia gene) and one X chromosome from the father (which is normal).
In conclusion, when a haemophilic female marries a normal male, all of their sons will be normal (not haemophilic), while their daughters will have a 50% chance of being haemophilic and a 50% chance of being carriers.
Explanation:
When a haemophilic female marries a normal male, there are certain genetic factors that need to be considered in order to determine the likelihood of their offspring inheriting hemophilia.
1. Hemophilia is a sex-linked recessive disorder that is carried on the X chromosome. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY).
2. If a female is haemophilic, it means that both of her X chromosomes carry the hemophilia gene. Since the male only has one X chromosome, he is not a carrier of the hemophilia gene.
3. When the female haemophilic marries a normal male, there are two possible genotypes for the female: XhXh (haemophilic) or XhX (carrier). The male genotype is XY.
4. The possible genotypes for their offspring are as follows:
- Female offspring: XhXh (haemophilic) or XhX (carrier)
- Male offspring: XY (normal)
5. Since the male offspring only receives the Y chromosome from the father, they will not inherit the hemophilia gene. Therefore, all sons of a haemophilic female and normal male will be haemophilia-free.
6. However, all daughters of a haemophilic female and normal male have a 50% chance of being haemophilic (XhXh) and a 50% chance of being carriers (XhX). This is because the daughters receive one X chromosome from the mother (which carries the hemophilia gene) and one X chromosome from the father (which is normal).
In conclusion, when a haemophilic female marries a normal male, all of their sons will be normal (not haemophilic), while their daughters will have a 50% chance of being haemophilic and a 50% chance of being carriers.
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Haemophilic female marries normal male, the theoretical ratio of their offsprings regarding hemophilia will bea)all offsprings are haemophilicb)all girls are haemophilicc)all sons are haemophilicd)half daughters and half sons are haemophilicCorrect answer is option 'C'. Can you explain this answer?
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