Name___________________________

the IncredIble genetIcs worksheet  

1. Determine if the following are homozygous (HO) or heterozygous (HE):

TT__________ Hh__________ mm_________ Pp__________ RR__________

2. Given the descriptions and the genotypes, identify the phenotypes of the following:

a. Stretchy skin is dominant over normal skin, what is the phenotype for Ss ___________________

b. Super speed is a recessive mutation, and those who donít have it have normal speed. Whatís the phenotype of an individual with the genotype pp_______________________

c. Invisibility is also a recessive trait. What is the phenotype of an individual with the genotype VV________________________

3. Write the genotypes from the following descriptions:

a. Invisible__________ Purebred stretchy___________ Heterozygous for speed________

4. Dash, who has super speed and thus recessive, wants to ensure that his children also have this trait. Is it possible for him to marry a girl with normal speed and still pass on this trait to his children. Explain your answer and complete the Punnett squares to provide evidence.

a. What is Dashís genotype?______________

b. What are possible genotypes of wives? ____________________

c.

d. Which combination(s) will allow offspring with super speed? ______________________

5. Stretchy skin is dominant. Helen has stretchy skin and Bob doesnít. Even though none of their three children has stretchy skin is it possible for that trait to be passed on? Explain, and complete the Punnett square to provide evidence.

a. What is Helenís genotype?______________ Bobís genotype __________________

b. What is the probability that the stretchy trait can be

passed on? ______________

c. Shade, highlight, or circle the boxes of the possible

offspring in the Punnett square that show this

phenotype.

 

6. Since invisibility is a recessive trait and neither parent has this trait, can Bob be Violetís father? Prove that it is possible with a Punnett square.

a. What is Helenís genotype?______________ Bobís genotype __________________

b. What is the probability that the invisibility trait can be passed

on?____________

c. Shade, highlight, or circle the boxes of the possible offspring in the Punnett

square that show this phenotype.

7. As Jak-Jak grows up, he finds living with his recessive fire making ability a challenge. One that he wants to make sure that his children never have to deal with. He has met JoJo who lights up his life. While JoJo does not possess the fire making ability, her father did. Would it be possible for children with JoJo to be able to make fire?

a. What is Jak-Jakís genotype?______________ JoJoís genotype __________________

b. What is the probability that the fire making trait can be passed

on?______________________

c. Shade, highlight, or circle the boxes of the possible offspring in the Punnett

square that show this phenotype.

the IncredIble genetIcs worksheet                                                                                     Name___________________________

1.       Determine if the following are homozygous (HO) or heterozygous (HE):

 

TT__________                         Hh__________                                mm_________                                Pp__________                        RR__________

 

2.       Given the descriptions and the genotypes, identify the phenotypes of the following:

a.       Stretchy skin is dominant over normal skin, what is the phenotype for Ss ___________________

b.      Super speed is a recessive mutation, and those who donít have it have normal speed.  Whatís the phenotype of an individual with the genotype pp_______________________

c.       Invisibility is also a recessive trait.  What is the phenotype of an individual with the genotype VV________________________

 

3.       Write the genotypes from the following descriptions:

a.       Invisible__________             Purebred stretchy___________                              Heterozygous for speed________

 

4.       Dash, who has super speed and thus recessive, wants to ensure that his children also have this trait.  Is it possible for him to marry a girl with normal speed and still pass on this trait to his children.  Explain your answer and complete the Punnett squares to provide evidence.

a.       What is Dashís genotype?______________

b.      What are possible genotypes of wives? ____________________

 

 

 

 

 

 

 

 

 

 

 

c.        

 

d.      Which combination(s) will allow offspring with super speed? ______________________

 

5.       Stretchy skin is dominant.  Helen has stretchy skin and Bob doesnít.  Even though none of their three children has stretchy skin is it possible for that trait to be passed on?  Explain, and complete the Punnett square to provide evidence.

a.       What is Helenís genotype?______________                            Bobís genotype __________________

 

 

 

 

b.   What is the probability that the stretchy trait can be passed on? ______________

c.  Shade, highlight, or circle the boxes of the possible offspring in the Punnett square that show this phenotype.

 

6.       Since invisibility is a recessive trait and neither parent has this trait, can Bob be Violetís father?  Prove that it is possible with a Punnett square.

a.       What is Helenís genotype?______________                            Bobís genotype __________________

 

 

 

 

 

b.   What is the probability that the invisibility trait can be passed on?____________

c.   Shade, highlight, or circle the boxes of the possible offspring in the Punnett square that show this phenotype.

 

7.       As Jak-Jak grows up, he finds living with his recessive fire making ability a challenge.  One that he wants to make sure that his children never have to deal with.  He has met JoJo who lights up his life.  While JoJo does not possess the fire making ability, her father did.  Would it be possible for children with JoJo to be able to make fire?

a.       What is Jak-Jakís genotype?______________                          JoJoís genotype __________________

 

 

 

 

b.   What is the probability that the fire making trait can be passed on?______________________

c. Shade, highlight, or circle the boxes of the possible offspring in the Punnett square that show this phenotype.