By decomposing the cross, MmNn X Mmnn, into single gene outcomes, the possibility of obtaining a double recessive outcome for the ‘N’ gene is:     a) 50%!   b) 100!   c) 0%!   d) 25%!

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
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1) 

By decomposing the cross, MmNn X Mmnn, into single gene outcomes, the possibility of obtaining a double recessive outcome for the ‘N’ gene is:
 
 
a) 50%!
 
b) 100!
 
c) 0%!
 
d) 25%!
 
2) 
A 16-square Punnett is time-consuming to draw out. Dr. Thompson can  easily solve this problem by decomposing her dihybrid crosses into separate monohybrid Punnett squares, which would also be quicker than using a forked line diagram. If so, how many individual monohybrid Punnett squares will she need to draw?
 
 
a) Four Punnett squares.
 
b) Two Punnet squares.
 
c) One Punnett square.
 
d) Sixteen Punnett squares since there are 16 possible outcomes.
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