DNA/Genetics Quiz Review

What does DNA polymerase do?

• unwind DNA helix

• check for replication errors

• break covalent bonds in DNA molecules

• add free nucleotides to template DNA strands

What came up with the rule that A=T and C=G?

• Watson

• Crick

• Chargaff

• Franklin

What did Rosalind Franklin do?

• did x-ray crystallography experiments on DNA

• built 3D models of DNA

• stated that A=T and G=C

• invented DNA replication

DNA is replicated

• conservatively (each DNA has 2 new strands or 2 original strands)

• semi-conservatively (each DNA has 1 new strand, 1 original strand)

• dispersive (DNA is put together from random pieces of new and original DNA)

• semi-dispersive (DNA is put together from random pieces of new and original DNA while one contains a whole piece of new/original)

What is complimentary to the template ATCAGGA?

• AGGACTA

• ATCAGGA

• TAGTCCT

• AUCAGGA

Bonds between sugar and phosphate molecules on the "sides" of the DNA helix are held by ______________ bonds while bases are held together by ______________ bonds.

• covalent; covalent

• hydrogen; covalent

• hydrogen; hydrogen

• covalent; hydrogen

A nucleotide is a(n) ________________ of DNA.

• bond

• polymer

• monomer

• enzyme

The trait of pea plants for their seed color has two versions: yellow or green. These different versions are known as

• alleles.

• genes.

• chromosomes.

• traits.

Y is the allele for yellow seed coat in pea plants. y is the allele for green seed coat in pea plants. Yy is the __________________ while yellow is the _____________________.

• phenotype; genotype

• genotype; phenotype

• allele; gene

• homozygous; recessive

What is the genotypic ratio given for the cross between two heterozygous parents for a trait?

• 1:1

• 3:1

• 1:2:1

• 2:0:2