Q25 of 167 Page 192

Is it an example of monohybrid cross or dihybrid cross?

(B) This is an example of a monohybrid cross because there is just one trait i.e. height whose inheritance pattern is being studied.


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24

What do the following symbols used in the topic on heredity represent?

(a) TT (b) tt


(c) XX (d) XY

 25

What will you get in the F1 and F2 generations in the following cross ? Pure tall pea plant x pure dwarf pea plant?

 26

In the F2 generation of a cross, progeny having different traits are produced in the ratio 3 : 1. State whether it is a monohybrid cross or a dihybrid cross? Give one example of such a cross.

 27

What is the genotype of dwarf plants which always produced dwarf offspring ?