Punnett Squares

Learn Punnett squares and genetics probability! Practice dominant/recessive traits.

1. Growlie and Screech Growlie and Screech are monsters that have just gotten married. One horn is the dominant trait in monsters and two horns is the recessive trait. Both Growlie and Screech have one horn, and are heterozygous. What is the probability that they will have two horned babies? Punnett Square H h H HH Hh h Hh Hh What is the probability of Growlie and Screech having 1 horned offspring? 0% 25% 50% 75% 100% What is the probability of Growlie and Screech having 2 horned offspring? 0% 25% 50% 75% 100% What % of Slasher and Midnight's offspring will have black fur? 0% 25% 50% 75% 100% 3. Snakes Lucy, a snake breeder, recently acquired a normal-looking female corn snake that is heterozygous for a recessive albino trait. She bred the female with a pure albino snake and wants to know what the probability is of those two snakes having albino babies. Use (A) for the dominant trait and (a) for the recessive trait.The female's letters are already on the punnett square. Don't forget to add the letters for the male albino father. Punnett Square A a a Aa aa a Aa aa The offspring have a 50% chance of being albino and a 50% chance of having normal corn snake coloration. 0% of their offspring will be fast-moving Zombies.100% of their offspring will be slow-moving Zoombies. 5. Pummmkins In pumpkins, white skin color (J) is dominant to yellow skin color (j). Jack is a pumpkin homozygous for white skin. Sally is a pumpkin homozygous for yellow skin. Jack and Sally want to know what percentage of their kids could have yellow skin.Put Jack's letters on the first column on the LEFT.Put Sally's letters on the TOP row. Punnett Square j j J Jj Jj J Jj Jj When Jack and Sally have offspring they have a 100% chance of having offspring with the DOMINANT trait. Which means that all of their children will be white in color. They have a 50% chance of having offspring with face warts and a 50% chance of having offspring without face warts. So can they have children without lovely warts? Yes!