Of both normal parents, the chances of a male child becoming colour blind are (a) none (b) possible only when all the four grand parents had normal vision (c) possible only when father’s mother was colour blind (d) possible only when mother’s father was colour blind.

Of both normal parents, the chances of a male child
becoming colour blind are
(a) none
(b) possible only when all the four grand parents
had normal vision
(c) possible only when father’s mother was colour
blind
(d) possible only when mother’s father was colour
blind.
by

1 Answer

Answer :

(d) possible only when mother’s father was colour
blind.
by

Related questions

A colour blind girl is rare because she will be born only when (a) her mother and maternal grand father were colour blind (b) her father and maternal grand father were colour blind(c) her mother is colour blind and father has normal vision (d) parents have normal vision but grand parents were colour blind

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