Toothpick Fish Lab

The toothpick fish lab was a way to figure out what alleles there would be for the fish in each generation. Alleles tell how an organism will like (alleles are your genes). In each generation the majority of the fish were usually green and orange but there were some yellow and red fish in each new generation. When two green fish, two red fish, two orange fish, or one fish of one color mated another, they were able to have offspring. When two yellow fish mated, they wouldn't make any offspring and the yellow fish population went down. Green was always dominant, red was recessive to green, yellow is recessive to green, and orange could only occur when a red and a yellow fish mated. In the first generation, there were three sets of two green fish parents, and two sets of one green, one red parent. This made the offspring of 5/12 of the population green. There was one set of two red fish, and four sets of one red and one yellow fish. This made the offspring of 1 set red and the offspring of 4 sets orange. There were also 2 sets of yellow fish so the population went down. The second generation had only 5/6 of the population the first generation did because they lost the 2 yellow mated pairs. The second generation's offspring was 7/10 green. This was because the alleles ff the parents that made of 1 pair were both green, the alleles of 4 pairs was 1green, 1 red, and the alleles of 2 pairs were one green on yellow. For the other pairs, one was both red, and the other 3 were 1 red, one yellow. The pair of 2 red had red offspring, and the pairs of one red one yellow made orange offspring. For the third generation, there were 6 pairs with green offspring and, 4 pairs with orange offspring.For the pairs that had green offspring, 2 pairs of fish had both parents with green skin, and4 pairs of parents were green, 1 red. The third generation also had 4 pairs of parents with 1 red, 1 yellow, making 4 sets of orange offspring.

When it got to the fourth generation, a disaster happened. Factory waste was dumped into the stream and the algae died. No green fish are being easily found and eaten. Originally, the fourth generation had 2 sets of 1 green, 1 yellow parent, 6 pairs of 1 green on red parent, and 2 sets of on red on yellow parent. This means that 8/10 had green skin and 2/10 had orange skin. Then because of the disaster, all the green fish died. This left only 2/10 of the offspring alive for when it came to the time of the survivors. Some thing that could change in the lab is what can happen to the fourth generation. Instead of the green fish dieing from factory waste, they could have been a way that scientists discovered so that yellow fish could mate yellow fish and so that orange fish could mate all fish. This would change the lab because then the fish would start to multiply very quickly.