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Principles Of Inheritance And Variation

Question
CBSEENBI12000220
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Explain the following terms with example
(a) Co-dominance
(b) Incomplete dominance

Solution
(a) Codominance is the condition when both the alleles  are able to express themselves independently when present in heterozygous condition For example the allele IA and IB  in ABO Blood group system  are co-dominant. 

(b) Incomplete dominance is the condition when none of the allele is completely dominant over the other and a intermediate phenotype is seen when alleles are present in heterozygous condition. eg- Flower color in Snapdragon.

Some More Questions From Principles of Inheritance and Variation Chapter

Name one trait that does not blend.

Give one example of genetic trait for each of the following in humans : (i) Lethality (ii) Multiple allelism.

What for symbols AA and Aa stand ?

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 ?

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