Monohybrid Crosses Practice

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

• 0 %

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which of the following genotypes is homozygous dominant?

• A

• Aa

• AA

• aa

Genetic crosses involving a particular type of flower exhibit complete dominance with respect to petal color. Red (R) is dominant to white (r). Using the Punnett square, what is the expected percentage of offspring that will have white flowers from a cross of parent flowers with a genotype of Rr.

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-3

In the punnett square below, what belongs in the missing square

• tt

• Tt

• TT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Cross (Dad)Bb X (Mom)BB. List the possible genotypes from this cross.

• BB, Bb, bb

• BB

• BB, Bb

• bb,Bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following genotypes would be considered heterozygous?

• BB

• bb

• Tt

• TT

What is true about these two brothers that have brown eyes: One has genotype BB the other Bb.

• they have same phenotype and genotype

• they have different genotypes and phenotypes

• they have same phenotype but different genotypes

• they have same genotype but different phenotypes

Tags

NGSS.HS-LS3-1

An allele whose trait is only expressed when no dominant allele is present.

• hidden

• dominant

• recessive

• present

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

• tt

• Tt

• Bb

• TT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following is a genotype?

• long hair

• blue eyes

• Gg

• tall

Tags

NGSS.HS-LS3-1