Which of the following alleles is homozygous recessive?

• Tt

• tt

• TT

• t

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous genes
• mutated DNA

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

T - tall and t = short

In the punnett square below, what belongs in the missing square

• tt

• Tt

• Bb

• TT

TT, tt, PP, pp, SS, ss are examples of alleles that are ____.

• homozygous

• heterozygous

• different

• homologous

The exact genetic makeup of an organism, such as RR, Tt, PP is its?

• phenotype
• dominance
• genotype
• trait

Y for yellow body is dominant over y for blue body. What alleles would produce yellow bodies?

• YY, yy

• Yy, yy

• YY only

• YY, Yy

What is one advantage of sexual reproduction?

• offspring are identical to parents
• offspring are resistant to viruses
• offspring are born live, rather thna from eggs
• offspring inherit a wider variety of genetic information