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Principles Of Inheritance And Variation

Question
CBSEENBI12000223
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What will be the blood groups of the children of following matings ?

(a) IA IB x IBIB
(b) IAI° x IAIB
(c) IA IB x IAIB 
(d) I° I° x IAIB.

Solution
(a) When a cross is made between IAIB x IBIB, then the two offspring will have the blood group AB and two will have  blood group B.

(b) When a cross is made between IA I° x IA IB, then the two will have blood group A, one will have  AB and one will have blood group B.

(c) When a cross is made between IA IB x IAIB, then the two individuals will have blood group AB, one will have A blood group  and one will have blood group B.

(d) When a cross is made between I° I° x IAIB, then the two individuals will belong to blood group A and two to blood group B.

Some More Questions From Principles of Inheritance and Variation Chapter

Mention the phenomenon of pleiotropy by giving an example.

Name the plant that shows incomplete dominance in respect of the colour of its flower.

Write the genotypes of man with blood group A.

What is Mendel’s monohybrid phenotypic ratio ?

Write down Mendel’s dihybrid Phenotypic ratio 

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 ?

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