Practice Test for Mendelian Genetics

Which of the following is a heterozygous dominant genotype? 

• GG
• gg
• GGG
• Gg

In Mendel's pea plants, the homozygous recessive phenotype was white flowers.  If Mendel crossed two homozygous recessive pea plants, what color flowers would be seen in the offspring?

• white and purple
• white 
• purple
• lavendar

Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring?

• Gg
• gg
• GG

What percentage of the offspring will be purebred dominant?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Dominant alleles are represented by a(n)

• phenotype
• lower case letter
• upper case letter
• punnett square 

What type of traits "show up" in a population more often?

• dominant
• recessive
• punnett squares
• alleles

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

NGSS.HS-LS4-4

True or False:
A heterozygous dominant trait can be written as BB.

• True
• False

D = dimples        d = no dimples 
What is the genotype for a homozygous recessive offspring?

• DD
• Dd
• dd

Tags

NGSS.HS-LS3-1

What is the percentage of a homozyogus dominant offspring?

• 75%
• 50%
• 25%
• 0%

Tags

NGSS.HS-LS3-3

Round seeds are dominant to wrinkled seeds.
What is the genotype for a homozygous dominant offspring?

• RR
• Rr
• rr