Theoretically,the phenotype is expressed only when an enzyme converts a substrate into its product. During which of the following conditions is the phenotype affected?

  • A
    When the modified allele produces a normal enzyme.
  • B
    When the modified allele produces a non-functional enzyme.
  • C
    When the unmodified allele produces an enzyme.
  • D
    All of the above.

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Similar Questions

In maize, albinism is caused by the effect of:

Match the following columns.
Column-$I$ Column-$II$
$(w)$ Blood group $(a)$ Polygenic inheritance
$(x)$ Skin colour $(b)$ Aneuploidy
$(y)$ Mendelian disorder $(c)$ Incomplete dominance
$(z)$ Chromosomal disorder $(d)$ Sickle-cell anaemia
$(e)$ Co-dominance

How many types of zygotic combinations are possible between a cross $Aa \; BB \; Cc \; Dd \times AA \; bb \; Cc \; DD$?

$A$ diseased man marries a normal woman and they get three daughters and five sons. All the daughters were diseased and sons were normal. The gene of this disease is

Match List-$I$ with List-$II$ :
List-$I$ (Type of Inheritance) List-$II$ (Example)
$A$. Incomplete dominance $I$. Blood groups in human
$B$. Co-dominance $II$. Flower colour in Antirrhinum
$C$. Pleiotropy $III$. Skin colour in human
$D$. Polygenic inheritance $IV$. Phenylketonuria

Choose the correct answer from the options given below :

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