Power Study: Probability and Genetics Quiz For Mrs. Schworer

Match the terms that goes together Heterozygous Trait Phenotype Hybrid Homozygous Purebred 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 RR _________ ff __________ Tt __________ Ll __________ Homozygous Homozygous Heterozygous Heterozygous

Purebred brown hair color - _______ Hybrid with widows peak:______ 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 - _______ Hybrid with widows peak:______ Heterozygous with dimples: ______ Homozygous blonde hair color: ______ Ww Dd bb

Round eyes (R) are dominant to Oval eyes (r) in Mrs. Schworer’s family Round eyes (R) are dominant to Oval eyes (r) in Mrs. Schworer’s family. Give the PHENOTYPE for each of the genotypes below. RR - ______________ Rr - _______________ rr - _______________ Round eyes Round eyes Oval eyes

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. Donald Duck (heterozygous for long nose) = __________ Daffy Duck (homozygous for stubby nose) = __________ COMPLETE THE PUNNETT SQUARE Ll ll L l l Ll ll l Ll ll Percentage for long nose? ______% Percentage for stubby nose________% 50 50

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 types could their children have? Remember to use I , I , and I for the alleles. A B 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 W How many plants would be red? ___________% How many plants would be white? _________% How many plants would be pink? __________% 50 R RR RW R RR RW 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 