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Principles Of Inheritance And Variation

Question
CBSEENBI12047645
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1 : 2 : 1 phenotypic and genotypic ratio is found in

  • complementary genes

  • blending inheritance

  • multiple alleles

  • pseudo alleles

Solution

B.

blending inheritance

Incomplete dominance or blending inheritance was first seen in Mirabilis jalapa (4'O clock plant). Here when red flowers are crossed with white flowers variety the F1 hybrid is pink and F2 ratio is 1 red : 2 pink : 1 white.

Some More Questions From Principles of Inheritance and Variation Chapter

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.

How many chromosomes are found in human cells ?

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