Question

What will be the phenotype of the progeny, if a carrier haemophilic female marries a normal male? Explain

Answer 1

Hint: Haemophilia is a genetic disorder. In this infection, the body misplaces the capability to form blood globules desired to stop blood loss. This disease is inheritable.

Complete answer:
- Haemophilia is an infection produced entirely or in share by a variation in the DNA structure gone from the usual order. Hereditary disorders can be affected by a change in one genetic factor termed as monogenic syndrome.
- Haemophilia is a genetic disorder. It is an X-linked genetic disease in which X transmits a non-functional genetic factor. It is of two types Haemophilia A which happens due to low quantity of coagulation factor VIII, Haemophilia B which arises due to low level of thickening the factor IX.
- The haemophilia is an X-linked recessive gene. It means females are the carrier of haemophilia. It will be individual stated if the female grouping is dual receding.
- If a haemophilic carrier mother whose incomes are haemophilia is spoken in the recessive genetic factor stated as Xx wherever x represents the recessive haemophilia X linked gene is intersected with the regular man whose genetic material is signified as XY. The offsprings would be as follows:-
- The offspring produced are 50% females in which out of 2 one daughter is the carrier and one is normal. In the case of children, one is common and the additional is unhealthy.

Hence, the correct answer is option (B).

Note: Haemophilia is X recessive linked gene disorder. A carrier mother has 50% chance of transporting the syndrome to her offspring. An affected male will pass on the genes to the daughters.