1. P UNNETT S QUARE P ROBLEM S OLVING

2. There are two squirrels that have mated and produced offspring. One squirrel is heterozygous for black hair (Bb) and the other squirrel has brown hair (bb). What is the probability that the squirrel's children have black hair? Click here for the answer

3. In dogs, erect ears (E) is dominate over droopy ears (e). What are the results if two heterozygous dogs have a litter of puppies? Click here for the answer

4. In humans, straight toes (S) is dominant over curled toes (s). What would be the result of a cross between a recessive male and a heterozygous female? Click here for the answer

5. In humans, wavy hair (CS) results by the co-dominant situation of curly hair (C) and straight hair (S). What are the possible results if a curly-haired man and wavy-haired woman have children? Click here for the answer

6. BbBb bbbb 50% heterozygous black hair 50% homozygous brown hair Bb Heterozygou s black hair bb Homozygous brown hair Bb Heterozygou s black hair bb Homozygous brown hair return to problem solving

7. EE Homozygous erect Ee Heterozygous erect Ee Heterozygou s erect ee Homozygous droopy EeEe EeEe 75% erect ears 25% droopy ears return to problem solving

8. SsSs ssss 50% heterozygous straight toes 50% homozygous curled toes Ss Heterozygous straight toes ss Homozygous curled toes Ss Heterozygous straight toes ss Homozygous curled toes return to problem solving

9. C CSCS 50% curly hair 50% wavy hair CC curly hair (homozygous dominant) CC curly hair (homozygous dominant) CS wavy hair (heterozygous ) CS wavy hair (heterozygous) return to problem solving