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Principles Of Inheritance And Variation

Question

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Haploids are more suitable for mutation studies than the diploids. This is because

Haploids are reproductively more stable than diploids

mutagens penetrate in haploids more effectively than is diploids

haploids are more abundant in nature than diploids

all mutations, whether dominant or recessive are expressed in haploids

Solution

D.

all mutations, whether dominant or recessive are expressed in haploids

Haploid plants can be produced in large number by anther and ovary cultures. Haploids may be useful for isolation of mutants, since, even recessive mutant alleles will be expressed in the mutagen treated generation itself. Desirable mutants may be selected at the haploid level and their chromosome number may be doubled to obtain homozygous mutant lines in a single generation.

Some More Questions From Principles of Inheritance and Variation Chapter

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 ?

Define heterogamy. Give an example.

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