Amoeba Sisters Video Recap Monohybrid Crosses Mendelian Inheritance Answer Key

AMOEBA SISTERS: VIDEO RECAP MONOHYBRID CROSSES (MENDELIAN) Amoeba Sisters Video Recap: Monohybrid Crosses (Mendelian Inheritance) Vocabulary practice! Fill in missing boxes assuming that having hair for guinea pigs follows Mendelian inheritance, where the H dominant allele codes for hair and h codes for a lack of hair (hairless). Image Genotype Heterozygous or Homozygous? Phenotype HH 1. 2. 3. 4. Hairless 5. 6. Heterozygous 7. 8. An allele is a form of a gene. In the Punnett square on the right, how many H/h alleles does a baby guinea pig inherit from the mother? _______ How many H/h alleles does a baby guinea pig inherit from the father? _______. If a baby girl guinea pig looks almost identical to its mother, does this then mean that it inherited more alleles from its mother? Explain. (Hint: Think about the vocabulary words dominant and recessive.) AMOEBA SISTERS: VIDEO RECAP MONOHYBRID CROSSES (MENDELIAN) Mysterious Fred: A Guinea Pig Test Cross There is a teacher from Texas that loves hairless guinea pigs. In guinea pigs, the dominant allele H codes for the trait of having hair and the allele h codes for the trait of being hairless. (Assume Mendelian inheritance). Let’s say that this teacher receives her wish of finding a hairless guinea pig at a pet store and names her Genevieve. She finds another guinea pig at a store with hair that she names Fred. While she can be certain of Genevieve’s genotype, how could she determine what genotype Fred is? She can do a test cross! A test cross involves breeding an organism with a dominant trait (like Fred) with an organism that exhibits a recessive trait (like Genevieve). 15. Explain in your own words how the offspring from the test cross could help determine Fred’s genotype. 16. What could be some weaknesses with using a test cross to determine Fred’s genotype? 13. If Fred was genotype __________ and bred with Genevieve… 14. Please draw Punnett Square below to show prediction for offspring. 11. If Fred was genotype __________ and bred with Genevieve… 12. Please draw Punnett Square below to show prediction for offspring. 9. Genevieve has the genotype ___________. 10. Fred’s genotype could be ________ or _________.