Power Study: Probability and Genetics Quiz For Mrs. Schworer Terms Match the terms that goes together Heterozygous Trait Phenotype Hybrid Homozygous Purebred Phenotype Allele Definitions Phenotype - the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment. (trait) Genotype - he genetic constitution of an individual organism. (Allele) Homozygous - having the two genes that are the same. (Purebred) Heterozygous – having two genes that are different. (Hybrid) Heterozygous or Homozygous Classify each of the following gene pairs as heterozygous or homozygous Homozygous RR _________ Homozygous ff __________ Tt Heterozygous __________ Heterozygous Ll __________ TRAIT DOMINANT GENE RECESSIVE GENE Hair Color Brown - B Blonde - b Widows Peak With Widows Peak - W Without Widows Peak - w Dimples With Dimples - D Without Dimples - d BB Purebred brown hair color - _______ Ww Hybrid with widows peak:______ Dd Heterozygous with dimples: ______ bb Homozygous blonde hair color: ______ Round eyes (R) are dominant to Oval eyes (r) in Mrs. Schworer’s family. Give the PHENOTYPE for each of the genotypes below. Round eyes RR - ______________ Round eyes Rr - _______________ Oval eyes rr - _______________ Long nose – L Short nose - l Donald Duck is heterozygous for a long nose. He recently married Daffy Duck with homozygous for a stubby nose. Ll Donald Duck (heterozygous for long nose) = __________ ll Daffy Duck (homozygous for stubby nose) = __________ COMPLETE THE PUNNETT SQUARE L l l Ll ll l Ll ll 50 Percentage for long nose? ______% 50 Percentage for stubby nose________% What is Codominant? Codominance is …… A. Codominance is when a heterozygous organism will express or show both dominant alleles for a trait. B. Codominance is when nothing is dominant. C. Codominance is when a homozygous organism will express or show both dominant alleles for a trait. Codominance In horses theres is a codominance; (B) is the symbol for black, (W) is they symbol for white, and (BW) is the symbol for black and white. Cross a homozygous black male horse with a homozygous white female horse. B B W BW BW W BW BW Genotypes of offspring: Phenotypes of offspring: BW ______________________ Black and White ______________________ Multiple Alleles If Ryan has the blood type O and is married with Deanna who has the blood type A, she would be homozygous for this blood type, what blood A B types could their children have? Remember to use I , I , and I for the alleles. i i IA IA i IA i IA IA i IA i A The children would have blood type(s): ________________ Incomplete Dominance Bob the gardener is growing roses that come in the colors red (RR), white(WW), and pink (RW). What would happen if Bob crossed a pink flower with a red flower? R R RR W RW How many plants would be red? 50 ___________% How many plants would be white? _________% 0 R RR RW How many plants would be pink? 50 __________% Continue to look over your worksheets! Keep practicing past work and reviewing your terms! BEST OF LUCK! Take your time on the quiz and I know you will all do great