A normal couple has their first child, who is haemophilic. Work out a cross to show how it is possible. State the possibility of the normal and the haemophilic children, along with their sexes, that can be born to them.

A color-blind child is born to a normal couple. Work out a cross to show how it is possible. Mention the sex of this child.

(a) A couple with blood groups 'A' and 'B' respectively have a child with blood group 'O'. Work out a cross to show how it is possible and the probable blood groups that can be expected in their other off-springs. (b) Explain the genetic basis of blood groups in human population.

A woman has haemophilic brother and normal parents. She wants to marry a man who has no history of haemophila in his family. What is the possibility of her children having this disease

(a) A garden pea plant bearing terminal, violet flowers, when crossed with another pea plant bearing axial, violet flowers, produced axial, violet flowers and axial, white flowers in the ratio of 3 : 1. Work out the cross showing the genotypes of the parent pea plants and their progeny. (b) Name and state the law that can be derived from this cross and not from a monohybrid cross.

(a)How does a haemophilic patient suffer? (b)A haemophilic son is born to a normal couple,Explain the mechanism of this inheritance.What is the probability of a haemophilic daughter being born to this couple?

A couple had a son who was haemophilic along with a normal daughter. The daughter then grew older and was married to a man who was normal. They daughter had a haemophilic son. Study the pedigree chart given above and find out the correct analysis-

A cross between a normal couple resulted in a son who was haemophilic and a normal daughter. In course of time, when the daughter was married to a normal man, to their surprise, the grandson was also haemophilic. a) Represent this cross in the form of pedigree chart. Give the genotypes of the daughter and her husband. b) Write the conclusion you draw of the inheritance pattern of this disease.

First child of a normal pigmented couple is albino. The possibility of a second child being an albino is

A normal male marries a carrier female for haemophilia. What is the possibility of male child being haemophilic and what is the probability of female carrier?What is the probability of female child infected?