Genetics 2022

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

What is the probability of heterozygous (Hybrid) offspring?

• 25%
• 50%
• 0%
• 100%

What combination should go in the missing box?

• AA
• Aa
• aa
• none of these

Which of the following genotypes is homozygous dominant?

• A
• Aa
• AA
• aa

What is the phenotype of the offspring? (A-Brown hair; a-blond hair) 

• 50 % Brown Hair and 50% Blond Hair 
• 25 % Brown Hair and 75% Blond Hair 
• 75 % Brown Hair and 25% Blond Hair 
• 0% Brown Hair and 100% Blond Hair 

What goes in box 3

• Aabb
• AABB
• AAbb
• aaBb

What goes in box 15

• aabb

• AABB

• aaBB

• AAbb

Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r  = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds? 

• 0%
• 25%
• 50%
• 100%

Using the dihybrid cross and key provided, what is the probability of the offspring being tall and white?

• 9
• 2
• 3
• 6