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Principles Of Inheritance And Variation

Question
CBSEENBI12047464

Choose the correct statements regarding genetic disorders.

I. Turner's female is result of aneuploidy.

II. Tritanopia is a sex-linked recessive disorder.

III. Haemophilia-C follows criss-cross pattern of inheritance.

IV. Sickel cell anaemia is due to mutation of alleles in chromosome 11.

  • I, IV

  • II, III

  • I, III

  • II, III

Solution

A.

I, IV

Statement I and IV are correct. Other statements can be corrected as:

III) Haemophilia -C is a mild form of haemophilia affecting both sexes.

(II) Tritanopia is a colour blindness for blue-yellow colour. It is a rare colour vision disturbance. It is caused by heterozygous mutation.