Question

Choose the correct statements regarding genetic disorders.
(i) Turner's female is a result of aneuploidy
(ii) Tritanopia is a sex-linked recessive disorder
(iii) Haemophilia c follows criss cross pattern of inheritance
(iv) Sickle cell anaemia is due to mutation of alleles in chromosome.

• A. i, iii, iv
• B. ii, iii
• C. i, iii
• D. ii, iv

Answer 1

The correct option is A i, iii, iv

• Turner syndrome is a condition in human females where monosomy of X chromosome occurs. It results due to aneuploidy, abnormal number of chromosomes.
• In criss cross pattern of inheritance, the trait is transferred from mother to son and from father to daughter. Haemophilia C is an X-linked disorder showing this type of inheritance.
  
• Sickle cell anaemia is caused due to the mutation in gene located on chromosome 11. The mutation causes change of amino acid from glutamic acid to valine.
• Tritanopia is linked to the chromosome pair 7. Tritanopia is a disorder in which a person cannot differentiate between blue and yellow colors. It is an autosomal dominant disorder affecting both male and female equally.
  So, option A is correct.