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 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) 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 colour blind son is born normal parents It shows that

A colour blind boy is born to a couple with a normal colour vision. Write the genotype of the parents.

During a mohohybrid cross involving a tall pea plant with a dwarf pea plant, the offspring populations were tall and dwarf in equal ratio. Work out a cross to show how it is possible.

A child suffering from Thalassemia is born to a normal couple. But the mother is being blamed by the family for delivering a sick baby. (a) What is Thalassemia ? (b) How would you counsel the family not to blame the mother for delivering a child suffering from this disease ? Explain... (c) List the values your counselling can propagate in the families.

If birth to amale child and birth to a femal child are equal probable, then what is the probability that at least one of the three children born to a couple is male?

Free ear lobe in humans is an autosomal dominant trait. The recessive individuals show fused ear lobes.A child with fused ear lobes is born to a couple who have free ear lobes. What is the probability of their next child to be with free ear lobes?

A non-haemophilic couple was infomed by their doctor that there is possibility of a haemophilic child being born to them .Draw a checker board and find out the percentage of possibility of such a child among the progeny.