Give scientific reasons : human male never passes on gene for haemophilia to his son.

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4.Principles of Inheritance and Variation

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Give scientific reasons : The human male never passes on the gene for haemophilia to his son.

Option A

Option B

Option C

Option D

Solution

The gene for haemophilia is present on $X$-chromosome. $A$ male has only one $X$-chromosome which he receives from his mother and $Y$-chromosome from father. The human male passes the $\mathrm{X}$ chromosome to his daughters but not to the male progeny (son).

Standard 12

Biology

Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character.

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(AIPMT-2010)

The pedigree chart given below shows a particular trait which is absent in parents but present in the next generation irrespective of sexes. Draw your conclusion on the basis of the pedigree.

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$A$ : Sickel cell anaemia occurs due to the point mutation.
$R$ : $mRNA$ produced from $Hb(s)$ gene has $GAG$ instead of $GUG$.

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One of the following is not true to haemophilia

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A colour blind son will born when

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Give scientific reasons : The human male never passes on the gene for haemophilia to his son.

Solution

Similar Questions

Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character.

The pedigree chart given below shows a particular trait which is absent in parents but present in the next generation irrespective of sexes. Draw your conclusion on the basis of the pedigree.

$A$ : Sickel cell anaemia occurs due to the point mutation. $R$ : $mRNA$ produced from $Hb(s)$ gene has $GAG$ instead of $GUG$.

One of the following is not true to haemophilia

A colour blind son will born when

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$A$ : Sickel cell anaemia occurs due to the point mutation.
$R$ : $mRNA$ produced from $Hb(s)$ gene has $GAG$ instead of $GUG$.