Guest

Solved Examples on Heredity and Variation

Question1: If two genes are present at the same locus and after interacting with each other produce different effect are called [CBSE PMT 2001]

(a)      Codominance       

(b)      Dominance

(c)       Epistasis     

(d)      None of the above

Answer: a

Solution:

In co-dominance both the gene expressed for a particular character in F1 hybrid progeny. There is no blending of characters, whereas both the characters are expressed equally.

Get Chapter Test for this Topic

Question2: Blood groups are named because of the agglutinogen A and B present in [CPMT 1992, 93]

(a)      Plasma         

(b)      RBC  

(c)       WBC 

(d)      Platelet

Answer: b

Solution:

Blood groups are named because of the agglutinogen A and B present in RBC.

Question3: A normal woman whose father was albino marries an albino; what proportion of normal and albino can be expected among their offspring [CBSE PMT1994]

(a)      All albino    

(b)      One normal : one albino           

(c)       All normal  

(d)      Two normal : one albino

Answer: b

Solution:

The normal woman got one recessive albino gene from her father, and one normal pigment gene from her mother. The man she married has two albino genes. 50% of their offspring will have two albino genes, and will be albino themselves. 50% of their offspring will appear normal, with one normal pigment gene, and one recessive albino gene.

To know more about the study material of engineering and medical exams, please fill up the form given below:


TOP Your EXAMS!

Upto 50% Scholarship on Live Classes

Course Features

  • Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution

r