Genetics Unit Test Review

Heterozygous is when...

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

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

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

Which of the following genotypes is homozygous recessive?

• Tt
• tt
• TT
• t

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous
• DNA

One form of a gene is called_______________

• a DNA
• a Phenotype
• a trait
• an allele

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose sugar and adenine
• deoxyribose sugar and a hydrogen bond
• deoxyribose sugar and the nucleus
• deoxyribose sugar and phosphate

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base
• sugar, oxygen, nitrogen base
• sugar, phosphate, nitrogen base
• sugar, phosphate, protein