Person whose father is colourblind marries a lady whose mother is daughter of a colourblind man. The

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4.Principles of Inheritance and Variation

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Person whose father is colourblind marries a lady whose mother is daughter of a colourblind man. Their children will be

All normal

All colour blind

All sons colour blind

Some sons normal and some colour blind

Solution

(d) A person whose father is colourblind i.e. person is normal because colour blind genes located on $x$-chromosome of father and it is transfered into only its daughters.

This person marry with a lady whose mother is daughter of colour blind father i.e. lady is carrier for colour blind.

Thus normal man marries with a carrier lady and their sons will be some normal and some colour blind.

Standard 12

Biology

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

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(AIPMT-2012)

A marriage between normal visioned man and colourblind woman will produce which of the following types of offsprings

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:Match the columns :

Column $I$
Column $II$

$(a)$ Sickle cell anaemia $(x)$ Homogentisic acid

$(b)$ Alkaptonuria $(y)$ Melanin pigmentsare absent

$(c)$ Albinism $(z)$ More amount of phenyl alanine

$(d)$ Phenyl Ketonuria $(w)$ Defective haemoglobin

easy

A boy is colour blind, in his two sisters one is colour blind and one is carrier $(normal)$. Then who is colour blind in his family

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Why is the frequency of red-green colour blindness is many times higher in males than that in the females ?

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Column $I$	Column $II$
$(a)$ Sickle cell anaemia	$(x)$ Homogentisic acid
$(b)$ Alkaptonuria	$(y)$ Melanin pigmentsare absent
$(c)$ Albinism	$(z)$ More amount of phenyl alanine
$(d)$ Phenyl Ketonuria	$(w)$ Defective haemoglobin

Person whose father is colourblind marries a lady whose mother is daughter of a colourblind man. Their children will be

Solution

Similar Questions

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

A marriage between normal visioned man and colourblind woman will produce which of the following types of offsprings

:Match the columns : Column $I$ Column $II$ $(a)$ Sickle cell anaemia $(x)$ Homogentisic acid $(b)$ Alkaptonuria $(y)$ Melanin pigmentsare absent $(c)$ Albinism $(z)$ More amount of phenyl alanine $(d)$ Phenyl Ketonuria $(w)$ Defective haemoglobin

A boy is colour blind, in his two sisters one is colour blind and one is carrier $(normal)$. Then who is colour blind in his family

Why is the frequency of red-green colour blindness is many times higher in males than that in the females ?

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:Match the columns :

Column $I$
Column $II$

$(a)$ Sickle cell anaemia $(x)$ Homogentisic acid

$(b)$ Alkaptonuria $(y)$ Melanin pigmentsare absent

$(c)$ Albinism $(z)$ More amount of phenyl alanine

$(d)$ Phenyl Ketonuria $(w)$ Defective haemoglobin