Genotype Ratios

The genotypic percentage resulting from this this cross would be _____________________.

• 25% blue eye 75 % brown eye 
• BB = 25% Bb = 50% bb = 25%
• BB= 50 % bb = 50%
• All brown eye

What are the possible genotypes for this cross?

• TT = 25% Tt= 50% tt=25%
• all tall
• TT= 75% tt = 25%
• Tt = 100%

Red flower (R) color is dominant to white flower (r) color in rose plants. What is the  expected phenotypic results of a cross between two heterozygous (Rr) rose plants?

• 100% red
• 75% red, 25% white
• 50% red, 50% white
• 75% white, 25% red

HH crossed with Hh. What is the probability of hh?

• 0%
• 25%
• 50%
• 100%

___________________________ is the study of how traits are passed on, or inherited.

• dominant traits
• ratio
• phenotype
• genetics

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous
• DNA

True or False:  Recessive traits are ALWAYS present 

• True
• False