Genetics Review:

An allele whose trait always shows up in the organism when the allele is present.

• recessive allele
• dominant allele
• hidden allele
• present allele

An allele whose trait only shows up when no dominant allele is present.

• hidden allele
• dominant allele
• recessive allele
• present allele

What is an organism's phenotype?

• It's physical appearance
• It represents the genes inside the organism
• Aa
• It's DNA

What is an organism's genotype?

• Homozygous
• It's physical appearance
• A trait that overpowers another
• The two-letter combination of alleles (AA, Aa, or aa)

What does purebred mean?

• Having no alleles

• Having two different alleles

• Having two of the same alleles

• Having 4 alleles

What does hybrid mean?

• Having no alleles

• Having two different alleles

• Having two of the same alleles

• Having 4 alleles

Which of the following represents a homozygous dominant genotype?

• Aa
• AA
• aa
• AaBb

Which of the following represents a heterozygous genotype?

• TT
• tt
• Tt
• TtSs

What type of letter is used to represent dominant traits?

• capital
• lowercase

What type of letter is used to represent recessive traits?

• capital
• lowercase