Pick out correct statements. (1) Haemophilia is a sexlinked recessive disease. (2) Down’s

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4.Principles of Inheritance and Variation

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Pick out the correct statements.

$(1)$ Haemophilia is a sexlinked recessive disease.

$(2)$ Down’s syndrome is due to aneuploidy.

$(3)$ Phenylketonuria is an autosomal recessive gene disorder.

$(4)$ Sickle cell anaemia is an $X$-linked recessive gene disorder.

$(1), (3)$ and $(4)$ are correct.

$(1), (2)$ and $(3)$ are correct.

$(1) $ and $(4) $ are correct.

$(2)$ and $(4)$ are correct.

(NEET-2016)

Solution

(b): Sicklecell anaemia is an autosomal recessive genetic disorder. It can be transmitted from parents to the offspring when b oth the partners are carriers of the gene (or heterozygous).

Standard 12

Biology

Match the terms in column $I$ with their description in column $II$ and choose the correct option.

Column $-I$ Column $-II$

$(A)$ Dominance $(i)$ Many genesgovern a single character

$(B)$ Codominance $(ii)$ In a heterozygousorganism only one allele expresses itself

$(C)$ Pleiotropy $(iii)$ In a heterozygousorganism both alleles express themselves fully

$(D)$ Polygenic $(iv)$ A single gene inheritanceinfluences many characters

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(NEET-2016)

A man can inherit his $X-$chromosome from his

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Choose correct answer :

$(i)$ Queen Elizabeth shows a number of haemophilic descendents.

$(ii)$ Variation in blood group prevalences due to incomplete dominance.

$(iii)$ Drosophila has three pairs of autosomal chromosomes.

$(iv)$ In birds, female is heterozygous.

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Select the correct statement:

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(NEET-2018)

Which of the following characteristics represent ‘Inheritance of blood groups’ in humans?
$(a)$ Dominance
$(b)$ Co-dominance
$(c)$ Multiple allele
$(d)$ Incomplete dominance
$(e)$ Polygenic inheritance

medium

(NEET-2018)

Column $-I$	Column $-II$
$(A)$ Dominance	$(i)$ Many genesgovern a single character
$(B)$ Codominance	$(ii)$ In a heterozygousorganism only one allele expresses itself
$(C)$ Pleiotropy	$(iii)$ In a heterozygousorganism both alleles express themselves fully
$(D)$ Polygenic	$(iv)$ A single gene inheritanceinfluences many characters

Pick out the correct statements. $(1)$ Haemophilia is a sex­linked recessive disease. $(2)$ Down’s syndrome is due to aneuploidy. $(3)$ Phenylketonuria is an autosomal recessive gene disorder. $(4)$ Sickle cell anaemia is an $X$-­linked recessive gene disorder.

Solution

Similar Questions

A man can inherit his $X-$chromosome from his

Choose correct answer : $(i)$ Queen Elizabeth shows a number of haemophilic descendents. $(ii)$ Variation in blood group prevalences due to incomplete dominance. $(iii)$ Drosophila has three pairs of autosomal chromosomes. $(iv)$ In birds, female is heterozygous.

Select the correct statement:

Which of the following characteristics represent ‘Inheritance of blood groups’ in humans? $(a)$ Dominance $(b)$ Co-dominance $(c)$ Multiple allele $(d)$ Incomplete dominance $(e)$ Polygenic inheritance

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Pick out the correct statements.

$(1)$ Haemophilia is a sexlinked recessive disease.

$(2)$ Down’s syndrome is due to aneuploidy.

$(3)$ Phenylketonuria is an autosomal recessive gene disorder.

$(4)$ Sickle cell anaemia is an $X$-linked recessive gene disorder.

Choose correct answer :

$(i)$ Queen Elizabeth shows a number of haemophilic descendents.

$(ii)$ Variation in blood group prevalences due to incomplete dominance.

$(iii)$ Drosophila has three pairs of autosomal chromosomes.

$(iv)$ In birds, female is heterozygous.

Which of the following characteristics represent ‘Inheritance of blood groups’ in humans?
$(a)$ Dominance
$(b)$ Co-dominance
$(c)$ Multiple allele
$(d)$ Incomplete dominance
$(e)$ Polygenic inheritance