Unit 4 Exam

A  False

B  True

A  True

B  False

A  True

B  False

A  True

B  False

A  True

B  False

A  False

B  True

A  The amount of adenine is equal to the amount of uracil, and the amount of guanine is equal to the amount of cytosine.

B  The amount of adenine is equal to the amount of guanine, and the amount of thymine is equal to the amount of cytosine.

C  The amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of cytosine.

D  The amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of uracil.

E  The amount of adenine is equal to the amount of cytosine, and the amount of guanine is equal to the amount of thymine.

A  cloning bacterial DNA

B  creating a gene library from bacterial DNA

C  using PCR to amplify bacterial DNA

D  using restriction enzymes to chop bacterial DNA into small pieces

E  using CRISPR to find and cut a specific sequence of bacterial DNA

A  nucleotide

B  nucleic acid

C  carbohydrate

D  fatty acid

E  amino acid

A  A positive result means that she has a greater risk of developing breast cancer than someone without the BRCA1 and BRCA2 mutation.

B  A positive result means that she would definitely develop breast cancer during her lifetime.

C  A negative result means that she would never develop breast cancer during her lifetime.

D  A negative result means that she has a greater risk of developing breast cancer than someone who carries the BRCA1 and BRCA2 mutation.

E  The results of the screening cannot determine whether an individual has an elevated risk of developing breast cancer, only whether or not the mutation is present.

A  one specific recipe in the cookbook.

B  the sequence of letters in a recipe in the cookbook.

C  a single step in one recipe in the cookbook.

D  the entire cookbook.

E  a chapter on desserts in the cookbook.

A  a transgenic organism.

B  genetic engineering.

C  CRISPR.

D  cloning.

E  polymerase chain reaction (PCR).

A  a nitrogen-containing base

B  another sugar-phosphate strand

C  a nitrogen-containing acid

D  a promoter

E  a carbon-containing base

A  Fifty percent of their daughters and fifty percent of their sons exhibit hypophosphatemia.

B  All of their sons and none of their daughters exhibit hypophosphatemia.

C  Seventy-five percent of their offspring exhibit hypophosphatemia.

D  Twenty-five percent of their offspring exhibit hypophosphatemia.

E  All of their daughters and none of their sons exhibit hypophosphatemia.

A  The trait exhibits a continuous distribution.

B  The heterozygote expresses the phenotype of both homozygotes.

C  The phenotype of the heterozygote falls between the phenotypes of the homozygotes.

D  The alleles affect more than one trait.

E  The dominant allele is not always expressed.

A  cannot have children with cystic fibrosis

B  has cystic fibrosis

C  will have children who are all carriers of cystic fibrosis

D  cannot reproduce

E  is a carrier

A  The gene for color vision is incompletely dominant to the gene for sex determination.

B  The gene for color vision is completely dominant to the gene for sex determination.

C  The gene for color vision is linked to the Y chromosome.

D  The gene for color vision is codominant with the gene for sex determination.

E  The gene for color vision is linked to the X chromosome.

A  DD

B  dd

C  DI

D  Dd

A  pleiotropic

B  recessive

C  dominant

D  codominant

E  incompletely dominant

A  centrosomes

B  nonsexosomes

C  autosomes

D  allosomes

E  centromeres

A  n + 1 only

B  2 n + 1 or n – 1

C  n + 1 or n – 1

D  2 n – 1 only

E  2 n + 1 or 2 n – 1

A  spindle

B  centrosome

C  chromatin

D  centriole

E  centromere

A  hexaploid

B  Identical in all ways.

C  prepared to replicate chromosomes.

D  genetically different.

E  genetically identical.

A  YOX

B  XOY

C  XY

D  XO

E  XYY

A  46

B  2

C  23

D  22

E  44

A  one

B  two

C  three

D  four

E  five

A  genes

B  chromatids

C  centromeres

D  genomes

E  centrosomes

A  chromosomes

B  centrosomes

C  centromeres

D  chiasma

E  nuclei