Incomplete Dominance and Codominance

Unlock the secrets of non-Mendelian inheritance! Practice incomplete and codominance genetics problems.

Part 1 - Amoeba Sisters Video Watch the video on non-mendelian traits to answer the questions below. Incomplete and Codominance 1. What is a non-mendelian trait? When having a dominant trait doesn't mean the dominant trait will show. When having a recessive trait doesn't mean the recessive trait will show. When having a dominant and recessive traits show up at the same time. 2. How many phenotypes can snapdragons have? 1 2 3 3. What is incomplete dominance? When only the dominant trait shows up. When both the dominant and recessive trait show up. When only the recessive trait shows up. 4. In codominance, _ trait(s) show up. one no both 5. Which of the following is an example of a polygenic trait? height eye color flower color 6. Use the text at time 4:40 to fill the blanks. Epistasis is when one gene depends on another gene to be expressed. Part 2 - General Practice Use you notes and information from the video to answer the following questions about incomplete and codominance. 7. Sort the statements into the correct group. Each group will have three statements in it. Codominance Heterozygous offspring from purple flower and a white flower parents have purple and white stripes Both traits have equal dominance Heterozygous individual shows a combination of phenotypes Incomplete Dominance Heterozygous offspring from purple flower and a white flower parents have light purple flowers Neither trait is dominant over the other Heterozygous individual shows an intermediate phenotype Complete Dominance Heterozygous individual shows the dominant phenotype Heterozygous offspring from purple flower and a white flower parents have purple flowers One trait is dominant, one trait is recessive Recessive homozygous individual shows recessive phenotype only appears when two identical alleles are present Two black rabbits have an offspring that is tan. 8. A chicken breeder has chickens that are white, black, or speckled. Speckled chickens have both black and white feathers. The allele for white feathers is (W). The allele for black feathers is (B).Determine the genotypes of the rooster and hen that would breed the greatest percentage of speckled chickens. BW x BW BB x BW BW x WW BB x WW 9. In cows, brown (B) is codominant with white (W). The heterozygous phenotype is brown and white speckles. A farmer decided to cross a brown cow and a white cow in hopes of making all brown and white speckles. What percentage of the offspring will be brown with white speckles? 25% 50% 75% 100% 10. The table gives the genotypes and phenotypes of blood:Which phenotype displays codominant inheritance? O A B AB 11. In humans, wavy hair (CS) results by the incomplete dominant situation of curly hair (C) and straight hair (S). What are the phenotypic ratios of offspring if a curly-haired man and wavy-haired woman reproduce? 50% Curly; 50% Straight 50% Curly; 50% Wavy 50% Wavy; 50% Straight 50% CC; 50% SS 50% CC; 50% CS 50% CS; 50% SS 12. Oompahs can have red (RR), blue (BB), or purple (BR) hair. What type of dominance is this? Complete dominance Codominance Incomplete dominance 13. Orville Oompah has purple hair and is married to Opal Oompah who brags that she has the bluest blue hair in the valley. What percentage of Opal’s children will be able to brag about their blue hair also? 0% 25% 50% 75% 100% 14. One of Opal's children is born with shocking red hair. Opal swears that she has been faithful, she claims the hospital goofed and got her baby mixed with someone else's. Is Opal the mother of the red haired child? Yes No