Define and design a test cross.

Solution

Test Cross. It is a cross between an organism with a dominant phenotype and a recessive parent to determine the genotype of the individual.

The cross between a Tt/TT (dominant individual) and tt (recessive parent) is a test cross. the genotype of the individual is considered homozygous(TT) when all progeny are Tall , whereas genotype is considered to be Heterozygous (Tt) if the 50% are tall and 50% are dwarf

TT (dominant individual)

\times

tt (recessive parent)

Tt (dominant individual)

\times

tt (recessive parent)

Some More Questions From Principles of Inheritance and Variation Chapter

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Principles Of Inheritance And Variation

Define and design a test cross.

Some More Questions From Principles of Inheritance and Variation Chapter

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 ?

Define heterogamy. Give an example.

How many chromosomes are found in human cells ?

Why is male Drosophila regarded as heterogametic ?

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