Genetics Quiz

Phenotype or Genotype? The combination of alleles/letters

• Phenotype

• Genotype

Phenotype or Genotype? The physical expression/appearance of a gene

• Phenotype

• Genotype

This trait is hidden whenever the dominant allele is present

• dominant allele

• recessive allele

• Punnett square

• codominance

Identify the homozygous dominant genotype:

• Ff

• FF

• ff

• fF

Which of the following genotypes is heterozygous?

• bb

• BB

• B

• Bb

An organism that has two identical (THE SAME) alleles for a trait.

• heterozygous

• twin

• homozygous

• dominant

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive
• dominant
• lower case letter
• both 

In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant (tt)?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.MS-LS3-2

What are the possible genotypes for this cross?

• TT = 25% Tt= 50% tt=25%

• tt = 100%

• TT= 75% tt = 25%

• Tt = 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What ratio of the offspring from the cross shown will be homozygous recessive for the  trait of tallness? 

• 0 in 4
• 1 in 4
• 2 in 4
• 4 in 4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3