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Principles Of Inheritance And Variation

Question
CBSEENBI12003161
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X- linked recessive gene is

  • always expressed in male

  • always expressed in femlae

  • lethal

  • sub- lethal

Solution

A.

always expressed in male

X- linked genes are represented twice in female and once in male. The recessive X- linked genes have characteritic criss- cross inheritance, ie, male transmits his X- linked recessive genes to his grandson through his daughter.

Some More Questions From Principles of Inheritance and Variation Chapter

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

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Mention the phenomenon of pleiotropy by giving an example.

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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 ?

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