University:
High School
Course:
High School Biology
Academic year:

2023
Views:

43

Pages:

4
Author:

BugDourorawsy50

Monster Genetics - Inheritance Lab This lab is designed to demonstrate genetics, or the study of how heritable characteristics are passed from generation to generation. Genetic traits are determined by genes, or small segments of DNA carried on chromosomes that determine physical characteristics. In this lab you will examine the traits of two monsters, and predict the traits of their potential offspring. Procedures Part 1: 1. Examine the table below. For any missing genotypes, flip a coin twice to determine the two genes your monster has. a. Heads = allele 1, Tails = allele 2 (Example: if you flipped heads twice, your monster will have two copies of allele 1 for his genotype.) 2. Determine and record the genotype of your Monster in the final column. 3. Repeat these steps to complete the table. 4. Name your monster. Table 1: My Monster’s Traits Trait Monster’s Name: _____________________ Allele 1 Allele 2 Two small eyes (E) One large eye (e) Red (R) White (r) Green (G) Blue (g) Has a tail (T) No tail (t) Tail Shape Curly (C) Straight (c) Tail Color Purple (P) Orange (p) Teeth Sharp (S) Round (s) Feet Four Toes (F) Two Toes (f) Horns (X sex-linked trait) Has Horns (H) No Horns (h) Pointy (Y) Round (y) Long (L) Short (l) Eyes Eye Color (incomplete dominant trait) Skin Color (co-dominant trait) Tail Present (regulatory gene) Ear Shape Claws Genotype TT pp Ll Phenotype Procedures Part 2: 1. Your monster has met another monster and really wants to make baby monsters. 2. Determine the genotypes and phenotypes for this new monster. Table 2: Monster’s Mate Trait Genotype Eyes ee White Eye Color Skin Color Gg Tail Present (regulatory gene) No Tail Tail Shape CC Tail Color pp Teeth Ss Feet Horns Two Toes XH Round Ear Shape Claws Phenotype Ll Procedures Part 3: 1. Complete a cross between your monster, and your monster’s mate. 2. Use the Punnett squares on the next page to help you keep track of the traits your Monster’s offspring will have. 3. If your Monster’s offspring could be dominant or recessive, flip a coin to determine whether they inherit the dominant or the recessive trait. a. Head = dominant trait; Tails = recessive trait 4. Draw a picture of your Monster’s offspring with the correct traits you determine from the Punnett squares. Eyes Eye Color Skin Color Tail Present Tail Shape Tail Color Teeth Feet Horns Ear Shape Claws Baby Monster Drawing 1. How were Punnett squares helpful in determining the traits of your Monster’s offspring? 2. Which trait(s) is your monster Heterozygous for? 3. Were there any traits that your offspring inherited that neither of the parent monsters had? 4. Select ONE trait from the list and build a simple pedigree for the parents and their baby monster. Be sure to include as much information as possible (correct symbols, name, genotypes, etc.)