(D) $(i)$ $ABO$ blood grouping is controlled by gene $I$. This is correct.(ii) Gene $I$ has three alleles $(I^A, I^B, i)$,not four. This is incorrect.

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(D) $(i)$ $ABO$ blood grouping is controlled by gene $I$. This is correct.(ii) Gene $I$ has three alleles $(I^A, I^B, i)$,not four. This is incorrect.(iii) $I^A$ produces $N$-acetylgalactosamine,while $I^B$ produces galactose. They produce different sugars. This is incorrect.(iv) The allele $i$ does not produce any sugar,whereas $I^A$ and $I^B$ produce specific sugars. This is incorrect.$(v)$ $I^A$ and $I^B$ are codominant,not incompletely dominant. This is incorrect.Therefore,statements $(ii), (iii), (iv),$ and $(v)$ are incorrect.

Class 12 Biology Principles of Inheritance and Variation Mix Examples- Principles of Inheritance and Variation

Medium

Which of the following statements are incorrect? $(i)$ $ABO$ blood grouping is controlled by gene $I$. (ii) Gene $I$ has four alleles. (iii) $I^A$ and $I^B$ produce the same type of sugar. (iv) $I$ or $i$ produces a different type of sugar. $(v)$ $I^A$ and $I^B$ are incompletely dominant.

A
$i, ii$
B
$v, ii$
C
$ii, iii, iv$
D
$ii, iii, iv, v$

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Class 12 Questions

Class 12

Biology Questions

Chapter

Principles of Inheritance and Variation

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Mix Examples- Principles of Inheritance and Variation

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?

MediumAIPMT 2012

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Sickle cell anaemia has not been eliminated from the African population because

MediumAIPMT 2006

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$A$ male human is heterozygous for autosomal genes $A$ and $B$ and is also hemizygous for the hemophilic gene $h$. What proportion of his sperms will be $abh$?

MediumAIPMT 2004

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Match the terms in Column-$I$ with their descriptions in Column-$II$ and select the correct option.
Column-$I$ Column-$II$
$(A)$ Dominance $(1)$ Many genes govern a single character.
$(B)$ Co-dominance $(2)$ In a heterozygous organism, only one allele expresses itself.
$(C)$ Pleiotropy $(3)$ In a heterozygous organism, both alleles express themselves fully.
$(D)$ Polygenic inheritance $(4)$ $A$ single gene influences many characters.

Medium

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The phenotype of an individual may be affected if the modified allele produces:
$(a)$ No enzyme at all
$(b)$ The normal/less efficient enzyme
$(c)$ $A$ non-functional enzyme

Medium

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Column-$I$	Column-$II$
$(A)$ Dominance	$(1)$ Many genes govern a single character.
$(B)$ Co-dominance	$(2)$ In a heterozygous organism, only one allele expresses itself.
$(C)$ Pleiotropy	$(3)$ In a heterozygous organism, both alleles express themselves fully.
$(D)$ Polygenic inheritance	$(4)$ $A$ single gene influences many characters.

Which of the following statements are incorrect? $(i)$ $ABO$ blood grouping is controlled by gene $I$. (ii) Gene $I$ has four alleles. (iii) $I^A$ and $I^B$ produce the same type of sugar. (iv) $I$ or $i$ produces a different type of sugar. $(v)$ $I^A$ and $I^B$ are incompletely dominant.

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?

Sickle cell anaemia has not been eliminated from the African population because

$A$ male human is heterozygous for autosomal genes $A$ and $B$ and is also hemizygous for the hemophilic gene $h$. What proportion of his sperms will be $abh$?

The phenotype of an individual may be affected if the modified allele produces:$(a)$ No enzyme at all$(b)$ The normal/less efficient enzyme$(c)$ $A$ non-functional enzyme

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The phenotype of an individual may be affected if the modified allele produces:
$(a)$ No enzyme at all
$(b)$ The normal/less efficient enzyme
$(c)$ $A$ non-functional enzyme