Genetics Review

Which of the following alleles is homozygous (purebred) recessive?

• Tt
• tt
• TT
• t

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous genes
• mutated DNA

Tags

NGSS.HS-LS3-2

Aa is

• homozygous (purebred)
• heterozygous (hybrid)

Tags

NGSS.HS-LS4-3

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

• recessive
• dominant
• lower case letter
• both 

Tags

CCSS.RF.3.3B

CCSS.RF.3.3C

CCSS.RF.3.3D

CCSS.RF.4.3A

CCSS.RF.5.3A

G = green, g = yellow
The genotype for a yellow plant is...

• GG
• Gg
• gg
• all of the choices result in yellow

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

T = tall an t = short
What is the phenotype for Tt?

• short
• tall
• medium sized
• neither tall or short

Tags

NGSS.MS-LS1-5

How many alleles (letters) do each person carry for a trait?

• 1
• 2
• 3
• 4

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

Which of the following is homozygous dominant?

• Yy
• Y
• yy
• YY

When a capital letter is used, what kind of allele is being represented?

• Recessive Allele
• Codominance
• Punnett Squares
• Dominant Allele