Question

If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?

No Chance

50%

25%

100%

Solution

25%

Thalassemia is the disorder due to reduced synthesis of either the alpha or beta chains, likewise designated as alpha or beta - thalassemias. When this autosomal mutant gene is present in a double dose. The disease is severely called as thalassemia major.

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 ?

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Principles Of Inheritance And Variation

If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?

No Chance

50%

25%

100%

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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For Daily Free Study Material Join wiredfaculty

Principles Of Inheritance And Variation

If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child? No Chance 50% 25% 100%

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?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?

No Chance

50%

25%

100%