A girl of normal vision whose father was colourblind marries a man of normal vision whose father was

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4.Principles of Inheritance and Variation

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A girl of normal vision whose father was colourblind marries a man of normal vision whose father was also colourblind. Their sons would be (of total number of $sons$)

All colourblind

$50\%$ colourblind

All normal

$25\%$ colourblind

Solution

(b) Infact the girl with normal vision is carrier because her father is colourblind (daughter of colourblind father are either colourblind or carrier) and when she marries a normal man the possibility of their sons being colourblind is $50\%$ because the genotype of parents is $X^CX$ and $XY$,

so only half of the possible combinations of $XY$ have the $X$-linked recessive genes which exhibit the disease.

Standard 12

Biology

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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Pattern baldness, moustaches and beard in human males are examples of

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(AIPMT-2003)

:Match the columns :

Column $I$
Column $II$

$(1)$ Albinism $(p)$ recessive gene
represented by
HbsHbs.

$(2)$ Phenyl
Ketonuria $(q)$ recessive gene
represented by cc.

$(3)$ Sickle cell
anaemia $(r)$ recessive gene
represented by aa.

$4)$ Alkaptonuria $(s)$ recessive gene
represented by pp

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A normal woman whose father was colour blind, is married to a normal man. The sons would be

medium

(AIIMS-2008)

Given below are two statements :
Statement $I :$ Sickle cell anaemia and Haemophilia are autosomal dominant traits.
Statement $II :$ Sickle cell anaemia and Haemophilia are disorders of the blood.
In the light of the above statements, choose the correct answer from the options given below :

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(NEET-2022)

Column $I$	Column $II$
$(1)$ Albinism	$(p)$ recessive gene represented by HbsHbs.
$(2)$ Phenyl Ketonuria	$(q)$ recessive gene represented by cc.
$(3)$ Sickle cell anaemia	$(r)$ recessive gene represented by aa.
$4)$ Alkaptonuria	$(s)$ recessive gene represented by pp

A girl of normal vision whose father was colourblind marries a man of normal vision whose father was also colourblind. Their sons would be (of total number of $sons$)

Solution

Similar Questions

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

Pattern baldness, moustaches and beard in human males are examples of

:Match the columns : Column $I$ Column $II$ $(1)$ Albinism $(p)$ recessive gene represented by HbsHbs. $(2)$ Phenyl Ketonuria $(q)$ recessive gene represented by cc. $(3)$ Sickle cell anaemia $(r)$ recessive gene represented by aa. $4)$ Alkaptonuria $(s)$ recessive gene represented by pp

A normal woman whose father was colour blind, is married to a normal man. The sons would be

Given below are two statements : Statement $I :$ Sickle cell anaemia and Haemophilia are autosomal dominant traits. Statement $II :$ Sickle cell anaemia and Haemophilia are disorders of the blood. In the light of the above statements, choose the correct answer from the options given below :

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:Match the columns :

Column $I$
Column $II$

$(1)$ Albinism $(p)$ recessive gene
represented by
HbsHbs.

$(2)$ Phenyl
Ketonuria $(q)$ recessive gene
represented by cc.

$(3)$ Sickle cell
anaemia $(r)$ recessive gene
represented by aa.

$4)$ Alkaptonuria $(s)$ recessive gene
represented by pp

Given below are two statements :
Statement $I :$ Sickle cell anaemia and Haemophilia are autosomal dominant traits.
Statement $II :$ Sickle cell anaemia and Haemophilia are disorders of the blood.
In the light of the above statements, choose the correct answer from the options given below :