Which of the following statement is incorrect?

A. The disorder in Collagen protein may cause "Ehlers-Danlos Syndrome"

B. A4 is the protein that is involved in Alzheimer's disease.

C. A mutation in the alpha chain of haemoglobin is the cause of sickle cell anemia

D. Klinefelter syndrome is a manifestation of XXY chromosome aneuploidy.

Q. Identify the correct statements from the following
(A) Individuals with Kartagener’s syndrome lack dynein protein
(B) Cystic fibrosis is an autosomal dominant disorder
(C) Sickle cell anemia is an example of pleiotropism in humans
(D) Phenylalanine hydroxylase converts phenylalanine to tyrosine in the spleen

Choose the correct option:

Q. Pick out the correct statements (a) Haemophilia is a sex-linked recessive disease (b) Down syndrome is due to aneuploidy (c) Phenylketonuria is an autosomal recessive gene disorder (d) Sickle cell anaemia is X-linked recessive gene disorder.

Q. Aneuploidy of which chromosome causes Patau syndrome?

Q. How many of the given statements are incorrect?

I. Thalassemia is caused due to mutation in only chromosome 21
II. Mutation on either chromosome 11 or 16 may cause sickle cell anaemia
III. At the 6${}^{\mathrm{th}}$ position beta globin chain, glycine is replaced by glutamic acid in case of sickle cell anaemia
IV. Phenylketonuria is caused due to lack of enzyme phenylalanine tyrosinase