GENETICS

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

• Tt
• tt
• TT
• t

Aa is

• homozygous (purebred)
• heterozygous (hybrid)

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

• recessive
• dominant
• lower case letter
• both 

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

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

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

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

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

• 1
• 2
• 3
• 4

How many alleles (letters) does a child get from each parent for each 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

Which of the following is homozygous dominant?

• Yy
• Y
• yy
• YY

In a Punnett square each box represents a(n)....

• offspring
• parent
• gene
• trait