2.     cross a heterozygous tall and round seed pea plant with

Blood Type

5.      What are the possible genotypes for each blood type?

1. Juan has blood type A (I^AI^A), his wife Lucia has blood type B (I^Bi).  What are the possible genotypes of their children?

1. A child has genotype of ii.  If the child’s mother has a genotype of I^Ai, which blood types COULD represent the father?

                           Dad               Mom                            Baby

                    ____  ____                 ____  _____                ____  ____

1. If a man with blood type O marries a woman with Type A, what would be the possible phenotypes of the offspring?

9.      What are the possible genotypes of children born to a man that has the genotype I^Ai and a woman that has the genotype I^AI^B?

10.  What blood types can donate blood to (list all):

a.     A person with type A blood?

b.    A person with type O blood?

c.     A person with type AB blood?

SEX LINKED TRAITS:

11.  Rickets is a condition in which the bones become soft.  Children with rickets develop bone deformities.  A lack of vitamin D, calcium, and phosphorus in the diet usually cause this condition.  One form of rickets, called vitamin D-resistant rickets, is caused by the recessive trait on the X chromosome.  A mother who is heterozygous for rickets marries a man who HAS rickets.

a.       What chance do they have of having a daughter with rickets?

b.      What chance do they have of having a daughter that is a carrier of rickets?

c.       What chance do they have of having a son who isnormal?

d.      What chance do they have of having a child with rickets?

1. Baldness is a sex-linked trait.  Sam wanted to know if he would be bald when he grew up. Therefore, Sam decided to find out how much of a chance he had of becoming bald.  Through research, he found out that his mother is a carrier for the baldness trait and that his father has a normal gene for hair.

a.       What chance does Sam have of being bald when he gets older?

b.      What chance would of having a daughter who will be bald?

c.       What chance would of having a daughter who is a carrier of the baldness trait?

1. In humans colorblindness is a sex-linked, recessive gene.  Having normal vision is dominant.  A woman who is heterozygous for colorblindness marries a man who is normal.  

a.       Normal _____                               b.  Mom  _____ ______         

      Color-blind _____                             Dad _____ _____

            c.  Make the Punnett square.

e.       What are the percent of this couple having daughters that are color-blind?

f.        What is the percent of having sons that are color-blind?

1. In cases of color-blindness in humans, it has been noted that most color-blind people are males.  Two normal parents have a color-blind son.

a.       Normal _____                               b.  Mom  _____ ______          Son _____ _____

      Color-blind _____                 Dad  _____ ______

            c.  Make the Punnett square.

 What are their chances for having a daughter whom is color-blind?