Pick out the correct statements.(1) Haemophil | vedclass

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(B) The correct statements are $(1), (2),$ and $(3)$.$(1)$ Haemophilia is a sex-linked recessive disease,which shows its transmission from unaffected

Vedclass · Accepted Answer

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

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(B) The correct statements are $(1), (2),$ and $(3)$.$(1)$ Haemophilia is a sex-linked recessive disease,which shows its transmission from unaffected carrier female to some of the male progeny.$(2)$ Down's syndrome is a chromosomal disorder caused by the presence of an additional copy of chromosome number $21$ (trisomy of $21$),which is a type of aneuploidy.$(3)$ Phenylketonuria is an inborn error of metabolism that is inherited as an autosomal recessive trait.$(4)$ Sickle cell anaemia is an autosomal recessive trait that can be transmitted from parents to the offspring when both the partners are carriers of the gene (or heterozygous). Therefore,statement $(4)$ is incorrect.

Pick out the correct statements.
$(1)$ Haemophilia is a sex-linked 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.

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Pick out the correct statements.$(1)$ Haemophilia is a sex-linked 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.