Punnett Square and Chromosomes

An allele that is masked when a dominant allele is present. The "weaker" gene. 

• Dominant Allele
• Recessive Allele

An allele whose trait always shows up in the organism when the allele is present. The "stronger" gene. 

• Dominant Allele
• Recessive Allele

An organism’s physical appearance, or visible traits. 

• Genotype
• Phenotype
• Beanotype
• Notype

What is called when a organism has  two different alleles for a trait. Tt or Rr

• Heterozygous
• Homozygous
• Domozygous
• Thermozygous

What is called when a organism has two identical alleles for a trait. TT or tt. RR or rr

• Heterozygous
• Homozygous
• Domozygous
• Thermozygous

In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being purple?

• 25%
• 0%
• 100%
• 50%

In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being white?

• 25%
• 0%
• 100%
• 50%

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 belongs in the last box?

• RR

• Rr

• rr

• ff

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

• tt
• Tt
• Bb
• TT