Mega Punnett Practice
Dominant Trait
/Recessive Trait
Black Fur / Brown furBrown eyes / Blue eyes
Axial flowers
/ Terminal flowersGreen peas / Yellow Peas
Six fingers per hand / Five Fingers per hand
Attached earlobes / Unattached earlobes
Blood Clotting factors / No blood clotting factors (hemophilia)
Color vision / Color blind
Short hair / Long hair
- A homozygous short-hair, homozygous brown fur rabbit is crossed with a heterozygous short-hair, heterozygous black fur rabbit.
Cross ______
Genotype______
Phenotype ______
- If the offspring of a person with attached earlobes and a person with unattached earlobes has any chance of having unattached earlobes what must the genotype of the parents be? What is the offsprings’ chance of having unattached earlobes?
Cross ______
Phenotype ______
- Cross a homozygous black dog with a homozygous white dog if you assume incomplete dominance.
Cross ______
Phenotype ______
Genotype ______
- A homozygous 6-fingered man meets and marries a 5-fingered woman. What are the chances that their children will have 5 fingers? (Not a sex linked trait!!)
Cross ______
Genotype ______
Phenotype ______
Chance ______
- Looking back at #4, suppose one of the male children of the couple met and married a
woman who has 5 fingers (you know, guys marry women just like their mothers!!). What will those children look like?
Cross ______
Phenotype ______
Genotype ______
- A woman who is heterozygous for the color blind gene meets and marries a man who has is not color blind. Remember that color blindness is a sex linked trait.
Cross ______
Genotype ______
Phenotype ______
- A woman who is color blind meets and marries a man who is not color blind. Remember that color blindness is a sex linked trait.
Cross ______
Genotype ______
Phenotype ______
- A woman who is heterozygous for hemophilia meets and marries a man who has hemophilia. Remember that hemophilia is a sex-linked trait
Cross ______
Phenotype ______
Genotype ______
- A yellow pea, homozygous axial flower pea plant crosses with a heterozygous green, terminal pea plant.
Cross ______
Phenotype ______
- A homozygous black fur rat crosses with a homozygous brown fur rat.
Cross ______
Phenotype ______
Genotype ______
- Any of the offspring in #10 cross with each other.
Cross ______
Genotype ______
Phenotype ______
12. A yellow flower crosses with a blue flower. Incomplete dominance occurs in these flowers (Hint: Ziplock commercial “Yellow and blue make green.”)
Cross ______
Genotype ______
Phenotype ______
13. Red and white flowers with incomplete dominance cross.
Cross ______
Genotype ______
Phenotype ______
- The offspring of the cross in #13 are crossed again
Cross ______
Genotype ______
Phenotype ______
15. Two heterozygous black fur cats have a 6 litters of kittens across a few years. Each litter has 8 kittens. How many of the kittens total can we expect to have black fur?
16. A heterozygous black fur cat with blue eyes and a brown fur, heterozygous brown eyed cat have 7 litters of kittens across a few years. Each litter has 8 cats. How many kittens will have:
Blue eyes?
Black fur?
Brown fur and blue eyes?
Brown fur and brown eyes?