Vocab
Genotype? Phenotype?
Co-Dominance & Incomplete
CHANCE
Hard Mode
100
Define Gene
*HINT LOOK AT YOUR NOTEBOOKS!
•Genetics is the study of inheritance of genes.
•i.e. genetics is how traits are passed down from parents to offspring
100
What is the phenotype of this organism?
Blue/Turquoise
100
Define Co-dominance
Both alleles are expressed equally - both traits appear and are expressed
100
Homozygous dominant or recessive?
aa
Homozygous recessive
100
A homozygous dominant male with bumpy skin is crossed with a homozygous recessive female with smooth skin. Do the F1 and F2 cross and respond with the phenotype percentages.
75% bumpy-skinned frogs
25% smooth-skinned frogs
200
Define Homozygous:
•Homozygous means that both of your genes are the same – either both are dominant or both are recessive
200
B=black, b=brown, two black mice mate and have some black and some brown mice. What is the genotype and phenotype of the crossing?
Genotype: 25% BB, 50% Bb, 25% bb
Phenotype: 75% black and 25% brown.
200
Define Incomplete Dominance
Neither allele is fully dominant, it is mixed/blended
200
Give an example of a heterozygous genotype.
Any answer with a capital letter and lowercase letter.
200
A homozygous dominant male with a striped shell is crossed with a homozygous recessive female with a plain shell. Do a F1 and F2 cross. What are the phenotypes for the F2 cross.
- 3 striped-shell turtles, 75%
- 1 plain-shell turtle, 25%
300
Define Heterozygous:
•Heterozygous means that you have both
a dominant and a recessive copy of a gene.
300
Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL the offspring in the next generation of this cross for fur color? AA x aa
Aa
300
Roan is a coat color found in many animals, including horses, cattle and dogs. It is defined generally as an even mixture of white and red hair. What offspring are expected from mating a roan bull and a roan cow? phenotypes? genotypes?
Genotype & Phenotype:
25% Red coat (RR), 50% Roan coat (RW), 25% white coat (WW)
300
Heterozygous genotype example?
Anything with a capitol letter and lowercase letter.
300
In lizards, having spines is dominant. Cross a homozygous male who has spines with a homozygous female who has no spines. What is the F2 genotypes?
Genotypes: 1: SS 2:Ss 1: ss
or 25% SS, 50% Ss, 25% ss
400
Define Genotype:
•Genotype is the term for the genes that an organism has.
400
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the phenotypes of the offspring?
50% Pp (purple), 50% pp (white)
400
In a certain tropical fish species, scale pattern is controlled by codominant alleles: D = Dark scales, L = Light scales, DL = Mottled scales (both dark + light patches visible). A mottled‑scale fish is crossed with a light‑scale fish. List all possible genotypes and phenotypes and percentages.
50% mottled-scale fish, 50% DL
50% light-scale fish, 50% LL
400
What is the genotype of Dory from Finding Nemo?
Blue!
400
In parrots, blue feathers are dominant over yellow ones. Curved beaks are also dominant over straight beaks. Cross a homozygous dominant male with a homozygous recessive female. After completing the F1 and F2, what is the phenotype ratio?
9: Blue feathers and curved beaks
3: Blue feathers and straight beaks
3: yellow feathers and curved beaks
1: yellow feathers and straight beak
500
Define Phenotype:
•Phenotype are the physical characteristics created by the combination of genes that an organism has.
500
In screech owls, red feathers are dominant over gray feathers. If two heterozygous red-feathered owls are mated, what percentage of their offspring would be expected to have red feathers?
75%
500
In a species of lizard, scale color shows incomplete dominance: G = green scales, B=blue scales, GB=Turquoise scales (blend of green and blue). A turquoise lizard is crossed with a blue lizard. What is the genotype + phenotype?
- 50% GB, 50% BB
- 50% Turquoise, 50% Blue
500
What day is the Nampa FFA chapter banquet? Time? Who can come?
Feb. 27th 6AM-9AM
Everyone can come!
500
In rabbits, long fur is dominant over short fur. Spotted coat pattern is dominant over solid coat pattern. A homozygous dominant doe is bred to a homozygous recessive buck.
After completing that mating, cross the F₁ offspring, which will result in a 16‑box (F₂) Punnett square. What is the phenotype with the ratio?
9:3:3:1
9: Long, Spotted
3: Long, Solid
3: Short, spotted
1: Short, Solid