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Principles Of Inheritance And Variation

Question
CBSEENBI12003198
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Which of the following is not a hereditary disease?

  • Cretinism

  • Cystic fibrosis

  • Thalassaemia

  • Haemophilia

Solution

A.

Cretinism

Cretinism is a disorder which is caused by the deficiency of thyroid hormones in infants. Symptoms of this disorder-

  1. slow body growth and mental development
  2. slow heart beat
  3. low blood pressure
  4. stunted growth
  5. retarded sexual development etc.

This disease can be treated by an early administration of thyroid hormones.

Some More Questions From Principles of Inheritance and Variation Chapter

Who were the rediscoverers of Mendelism ?

What are the real determinants of what an organism will become ?

What is the unique feature of F1 generation ?

What will be the genetic make up of an organism which suffers from sickle cell anaemia ?

What do the symbols square and circle in a pedigree chart indicate ?

Define heterogamy. Give an example.

How many chromosomes are found in human cells ?

Why is male Drosophila regarded as heterogametic ?

What term is used for the two chromatids resulting from the interchange of segments during crossing over ?

What is name of a cross in which a dominant individual is crossed with a recessive parent?

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