Question

A man whose father was colour blind marries a woman who had colour blind mother and normal father. What percentage of male children of this couple will be colour blind.
A.25%
B.0%
C.50%
D.75%

Answer 1

Hint: Pretty much every cell in your body contains 23 sets of firmly twisted DNA called chromosomes. You get 23 of them from your mom and 23 from your dad. One sets of chromosomes chooses your sex. The others contain a great many various qualities that choose each other's attributes, from hair and eye tone to your danger of getting infections. These are called autosomes.

Complete answer:
A few qualities are "prevailing." You just need one from a parent to have that characteristic. Different qualities are "passive." With them, you need to acquire similar quality from the two guardians to be influenced.
In the event that one of your folks gives a passive quality to you that can cause infection, at that point you become a "transporter." You probably won't have any indications, since the other quality is typical. Indeed, numerous individuals won't know they're a transporter without being tried.
In any case, in the event that you and your accomplice both have the equivalent changed quality, there's a 25% chance that your kid will be brought into the world with a serious illness.
As visual impairment is an autosomal passive hereditary issue, it is available at X - chromosome. Subsequently, as per the circumstance given in the inquiry, a man whose father was visually challenged (will be, i.e, XY ordinary) weds a lady whose mother was partially blind and father was typical (i.e, this lady will be a transporter).

So,the correct answer is "option A".

Note:
Subsequently, when marriage will occur between an ordinary man and a transporter lady, all things considered, the level of a male youngster to be visually challenged is 25%. Anybody can convey a passive quality that causes ailment, yet a few illnesses are more normal in certain ethnic gatherings.