Single Choice

If a colour-blind man marries a women who is homozygous for normal colour vision, the probability of their son being colour-blind is

A$$0.75$$
B$$1$$
C$$0$$
Correct Answer
D$$0.5$$

Solution

Colour-blind man ($$X^c$$Y) and normal woman (XX) can not have a colour-blind son as it is an X-linked recessive trait and is inherited by criss-cross inheritance. To have a colour-blind son, the mother should be a carrier ($$X^c$$X) or affected ($$X^cX^c$$) so as to pass the affected X chromosome to son.
Therefore, the correct answer is option C.

SIMILAR QUESTIONS

Genetics

Represented is the inheritance pattern of the certain type of traits in humans. Which one of the following conditions could be an example of this pattern?

Genetics

A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind?

Genetics

A colour blind man marries a woman with normal sight who has no history of color blindness in her family. What is the probability of their grandson through daughter being color blind?

Genetics

A man whose father is a colourblind, marries a woman, who is a daughter of a colourblind mother. The offsprings of this couple will be

Genetics

A colourblind man marry with a daughter of colourblind father, the generation will be

Genetics

Which of the following is a sex linked character?

Genetics

A colour blind man marry with a daughter of colour blind father, the generation will be

Genetics

The 'Christmas disease' patient lacks antihaemophilic

Genetics

Ishihara charts are used by opthalamologists for detecting

Genetics

Haemophilia does not occur in women because

Contact Details