# Punnett square

Punnett square
A. Choose the parental gametes, and align these in the correct positions around the Punnett square. (Type in the correct gametes. Pink are the female gametes, and blue are the male gametes. XC is the gene for normal vision, and Xc is the gene for color blindness.)
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B. Choose the correct genotype of the progeny to fill in the Punnett square.
(Type the correct genotypes in the boxes.)
What is the genotype of the mother?
What is the genotype of the father?
What are the possible phenotypes of their children?
What is the probability of the color blind trait in female children and the probability of the color blind trait in male children?
X and Y genes code for male and female gender. XX is female and XY is male. Why is XcY color blind, but XcXC not color blind? Can an XcXC female pass the color blind trait to her children?

Exercise 2: Freckles

C. Choose the parental gametes and align these in the correct positions around the Punnett square. (Type in the correct gametes. The pink are female gametes, and the blue are male gametes.)

A. Choose the correct genotype of the progeny to fill in the Punnett square.
(Type in the genotypes.)
What is the genotype of the mother?
What is the genotype of the father?
What are the possible phenotypes of the children?
What is the probability of freckles in their children?
Freckles in humans are inherited by which pattern: dominant/recessive, incomplete dominance, or codominance? Why does the mother have freckles, even though she has a gene for no freckles? Why does the father have no freckles?
Exercise 3: Blood Type

A male has Type A blood, and a female has Type B blood. Could they have a child with Type O blood? Demonstrate how this is genetically possible by filling out the Punnett square.

Choose the correct parental gametes from all of the potential blood type gametes below, and align these in the correct positions around the Punnett square. (Type in the correct gametes. The pink are female gametes, and the blue are male gametes.)
A. Choose the correct genotypes of the progeny, and fill in the Punnett square.
(Type the correct genotypes into the boxes from the possible genotypes shown below).

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