Punnett Squares

Heterozygous is when...

• the alleles are the same
• the alleles are different
• the alleles are absent
• the alleles are present

Genotype refers to the ...

• physical expression of the genes
• the possible combination of alleles in a gene
• whether an allele is dominant or recessive
• how an organism will appear

Aa is

• homozygous
• heterozygous

In a punnet square where are the parent alleles written?

• Top and inside the boxes
• Only on the left and right side of the boxes. 
• outside of the boxes (top and left side)
• All on the top side of the boxes

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

What is a punnett square?

• graph used to predict the possible genotypes of offspring in a given cross
• a graph used to predict the possible birth rate of offspring.
• a graph used to predict the possible behavioral characteristics an offspring could have
• None of the above

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

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

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

• recessive
• dominant
• lower case letter
• both 

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

• tt
• Tt
• Bb
• TT

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

• Tt
• tt
• TT
• t