REVIEW FOR QUIZ PUNNETT SQUARES

R – red flower r – yellow flower RR rr Red flowers are dominant to yellow flowers. A purebred red flower X yellow flower. What are the alleles: R – red flower r – yellow flower Genotype of parents: A purebred red flower X yellow flower. RR rr

? ? ? RR YY RY R – red flower Y – yellow flower Incomplete dominance When red flowers are crossed with yellow flowers, the offspring produced have orange flowers. red flower X yellow flower orange flower RR ? YY ? RY ? Genotypes? What are the alleles: R – red flower Y – yellow flower What type of inheritance? Incomplete dominance

? ? ? WW BB BW W – white flower B – blue flower Codominance When white flowers are crossed with blue flowers, the offspring produced have white and blue flowers. white flower X blue flower white & blue flower WW ? BB ? BW ? Genotypes? What are the alleles: W – white flower B – blue flower What type of inheritance? Codominance

red x blue purple ? ? ? RR BB BR What are the genotypes? What are the alleles? R – red B – blue What type of inheritance? Incomplete dominance

long x short medium ? ? ? LL SS LS What are the genotypes? What are the alleles? L – long S – short What type of inheritance? Incomplete dominance

black x white gray ? ? ? BB WW BW What are the genotypes? What are the alleles? B – black W – white What type of inheritance? Incomplete dominance

? ? ? curly hair x straight hair wavy hair CC SS CS What are the genotypes? What are the alleles? C – curly hair S – straight hair What type of inheritance? Incomplete dominance

In shorthorn cattle, when red cattle mate with a white cattle, the offspring are red with white patches. Cattle that are heterozygous, that is, red with white patches are called Roan cattle. Roan cow.

A roan bull is crossed with a white cow. In shorthorn cattle, when red cattle mate with a white cattle, the offspring are red with white spots. Cattle that are heterozygous, that is, red with white spots are called Roan cattle. Type of Inheritance? ________________ Codominance A roan bull is crossed with a white cow. Trait _______________ Coat color Red coat - R White coat - W Alleles? _______________ & _______________ RW WW Genotype of parents? ________ x ________ 50% RW 50 % WW % Genotype of offspring? __________________ 50% Roan coat % Phenotype of offspring? _________________ __________________ 50% white coat

In a certain species of pine trees, short needles are dominant to long needles. A pine tree heterozygous for short needles is crossed with a pine tree with long needles. Length of pine needles Trait ______________________ short needles - S long needles - s Alleles? _______________ & _______________ Ss ss Genotype of parents? ______ x _____ 50% Ss % Genotype of offspring? __________________ 50% ss 50% short needles % Phenotype of offspring? _________________ __________________ 50% long needles

Type of Inheritance? ______________________ Andalusian chickens are a rare breed of chicken that have grey feathers. These grey Andalusian chickens are produced when a black chicken is crossed with a white chicken. (Black + white = grey) Incomplete dominance Type of Inheritance? ______________________

An Andalusian chicken is crossed with another Andalusian chicken . Andalusian chickens are a rare breed of chicken that have grey feathers. These grey Andalusian chickens are produced when a black chicken is crossed with a white chicken. An Andalusian chicken is crossed with another Andalusian chicken . Trait _______________ feather color Alleles? _______________ & _________________ Black feather - B White feathers - W Genotype of parents? ________ x ________ BW BW 25% BB; 50% BW; 25% WW % Genotype of offspring?_______________________ 25% black feathers; % Phenotype of offspring?______________________ ___________________________________________ 50% Andalusian/grey feathers; 25% white feathers

IA IB ii Long lost son: ____ Mr. Howell Mr. Howell died and left all his money to his two children. A young man claiming to be a lost third child sued for his share of the estate. The judge ordered blood tests for all family members and for the young man. Mr. Howell had AB blood type. His wife had type A, and the young man who claimed to be the long lost son had type O blood. Can the long lost child be Mr. Howell’s son? ii Long lost son: ____ IA IB Mr. Howell Can the long lost child be Mr. Howell’s son? Mr Howell has no recessive i allele therefore it is not possible for him to be the father.