This lesson covers material in Chapter 6 of Holt Biology and Chapter 10 in Biology: Life on Earth. Students watched the following videos before class:
In class we watched a video by Veritasium – Why Women are Stripey.
I had the students do the same worksheet on punnett squares (Genetics: INB Activity Pack by Getting Nerdy with Mel and Gerdy) that the middle school class did and the Qwitekutesnute activity from Real Science Odyssey Biology Level 2. But instead of going with the traits listed in the activity the class chose different traits for the creatures. For example, instead of thin or fluffy tail, the creatures have spikes (dominant) or not (recessive), curly (dominant) or straight (recessive). We also chose to treat body color as an incomplete dominance trait, so if the creature had DD it was red, dd was yellow and Dd was orange. Students flipped 2 pennies to determine what alleles (heads – dominant trait, tails – recessive) their creature had. We ended up with some very interesting creatures, including a few mutations (blue spots and an extra leg!)
Once they had their creature finished they picked another creature from the class and bred them to create offspring. If a parent had DD, then it gives all offspring a D, but if a parent has Dd then you have to flip a coin to see which allele the parent gives its offspring. They go through all the traits with both parents and then draw the offspring. If students wanted the offspring to have wings then they needed to breed their creature with one who had 2 dominant alleles (WW) for wings, or at least one (Ww). Some students wanted to do multiple generations but we ran out of time.