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Download Biology Notes: Incomplete and Codominance
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Name: __________________________________________________________ Date: _______________ Period: _______ Biology Notes: Incomplete and Codominance Codominance • Defined: when a single gene has _________ than ________ dominant allele • Ex: Cattle ___________________ Additional Information Red cow x White cow = ________________: Colors blend ________________: Both colors are equally seen • Ex: Human _________________ types Type A x Type B = Type _______ Blood Types • Human blood type has ______ alleles – Dominant _____ allele – Dominant _____ allele – Recessive _____ allele • Type A & Type B are __________________ to type O • Type A and Type B are ____________________ to each other 1 minute: Discuss with your neighbor. Mike is heterozygous for type A blood and Lisa is heterozygous for type B blood. A) Probability of child having type A blood? __________ B) Probability of child having codominant blood? __________ C) Probability of child being Heterozygous? __________ 1 minute: Discuss with your neighbor. Jason is homozygous for type A blood and Maria who is heterozygous for type B blood. Their child, Rick, has codominant blood. a) Draw a pedigree for this family. b) Complete a Punnett square for Jason and Maria. c) What were the odds of Rick having codominant blood? Incomplete Dominance • Defined: ____________________ allele is completely dominant • Heterozygous = ____________________ appearance • More than ______ different ______________________ can occur • Ex: Many flower ___________________ Additional Information In certain species of fish, blue scales (BB) and yellow (YY) scales are incompletely dominant. Fill in the Punnett square with the genotype of a blue male and a green female. A) What is the probability of obtaining heterozygous fish? ________ B) Yellow fish? ________ Carnations show incomplete dominance where a red allele and white allele blend to make pink. A pink colored male pollinated a pink colored female. 7 seeds were created and later grew into plants with 3 having pink flowers, 2 with white flowers, and 2 with red flowers. a) Create a pedigree for these 9 flowers (make the offspring any gender you wish). b) Create a Punnett square for the parents. c) Probability of growing pink? _________
