Explain the terms (a) Pure line and (b) Reciprocal cross.

Solution

(a) Pure line- is one which breeds true that is they undergo self pollination and show no variation in trait inheritance and expression.

(b) Reciprocal cross. These crosses involve the crosses concerning the same characters but with reversed sexes. It means if in a cross, A is used as female parent and B as a male parent, then in 2nd cross or reciprocal cross A will be used as male parent and B as female parent. Reciprocal cross is generally used to dtermine the contribution of sexes in inheritance pattern.

Some More Questions From Principles of Inheritance and Variation Chapter

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Principles Of Inheritance And Variation

Explain the terms (a) Pure line and (b) Reciprocal cross.

Some More Questions From Principles of Inheritance and Variation Chapter

Write the genotypes of man with blood group A.

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Write down Mendel’s dihybrid Phenotypic ratio

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

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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 ?

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