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JIPMER 2015
Exam
JIPMER
Year
2015
Subject
Zoology
Chapter
Principles of Inheritance and Variation

JIPMER 2015 · Zoology · Principles of Inheritance and Variation

Match the following Column I with Column II. Column I Column II A....

Match the following Column I with Column II. <tableclass="qx−match−listqx−match−table"border="1"cellpadding="6"cellspacing="0"><tr><td><table class="qx-match-list qx-match-table" border="1" cellpadding="6" cellspacing="0"><tr><td>Column IColumn IIA.Complementary ratio1.9: 7B.Supplementary ratio2.9: 3: 4C.Epistatic ratio (Masking)3.12: 3: 1D.Inhibitory ratio4.13: 3 Codes

Options

  1. A A  B  C  D 4132\begin{array}{cccc}\text{ A } & \text{ B } & \text{ C } & \text{ D } \\ 4 & 1 & 3 & 2\end{array}
  2. B A  B  C  D 1234\begin{array}{cccc}\text{ A } & \text{ B } & \text{ C } & \text{ D } \\ 1 & 2 & 3 & 4\end{array}
  3. C A  B  C  D 4123\begin{array}{cccc}\text{ A } & \text{ B } & \text{ C } & \text{ D } \\ 4 & 1 & 2 & 3\end{array}
  4. D A  B  C  D 1324\begin{array}{cccc}\text{ A } & \text{ B } & \text{ C } & \text{ D } \\ 1 & 3 & 2 & 4\end{array}

Correct answer

B.  A  B  C  D 1234\begin{array}{cccc}\text{ A } & \text{ B } & \text{ C } & \text{ D } \\ 1 & 2 & 3 & 4\end{array}

Step-by-step solution

Epistasis is interaction between two or more genes to control a single phenotype. Dominant epistasis also called masking has a ratio 12:3:112: 3: 1 in the F2\mathrm{F}_2 phenotype. Supplementary genes which is recessive epistasis has ratio 9:3:49: 3: 4. Complementary gene where both dominant alleles are needed for phenotype has ratio 9:7. Inhibitor gene where one gene inhibits the expression of another gene has ratio 13:313: 3 in F2\mathrm{F}_2 progeny.
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