Stubug Genetics Activity

1. Survey the Stubug population above by filling in the follwing table.
    

   Stubug Trait	# of Stubugs In Population	% of Population (# with trait / total population)
   Curled Tail
   Straight Tail
   1 Back Hump
   2 Back Humps
   Dark Eyes
   Light Eyes
   Dark Nose
   Light Nose
   1 Antenna
   2 Antennae

    

2. Based on your population survey, list the traits that appear to be recessive.

    

    

    

3. Write one complete sentence giving the reason for your answer in question #2.

    

    

    

4. This Stubug is heterozygous for light nose.

   Its genotype is ____________________.

5. This Stubug is homozygous for dark nose.

   Its genotype is ____________________.

6. Dominance is complete for nose color in Stubugs. Draw the Punnett square predicting the nose color for the offspring of a cross between the two Stubugs above.

    

    

    

    

    

    

7. If there are 100 offspring from the cross above, __________________ will have dark noses.
    
8. If there are 100 offspring from the cross above, __________________ will be homozygous for light nose.
    
9. If the number of antennae is not controlled by genetics, write one complete sentence explaining why more Stubugs have two antennae than one.

    

    

10. The sex of a Stubug can be determined by the number of humps on its back.
    1. Which sex has two back humps? ____________________
    2. Write complete sentences explaining your reasoning.