Unit 4 Exam

A  True

B  False

A  False

B  True

A  False

B  True

A  False

B  True

A  False

B  True

A  True

B  False

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

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

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

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

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

A  cloning bacterial DNA

B  using restriction enzymes to chop bacterial DNA into small pieces

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

D  creating a gene library from bacterial DNA

E  using PCR to amplify bacterial DNA

A  nucleotide

B  carbohydrate

C  amino acid

D  fatty acid

E  nucleic acid

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

B  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.

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

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

A  a single step in one recipe in the cookbook.

B  one specific recipe in the cookbook.

C  the entire cookbook.

D  a chapter on desserts in the cookbook.

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

A  genetic engineering.

B  CRISPR.

C  polymerase chain reaction (PCR).

D  a transgenic organism.

E  cloning.

A  a nitrogen-containing base

B  a promoter

C  a nitrogen-containing acid

D  a carbon-containing base

E  another sugar-phosphate strand

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

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

C  Twenty-five percent of their offspring exhibit hypophosphatemia.

D  Seventy-five percent of their offspring exhibit hypophosphatemia.

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

A  The heterozygote expresses the phenotype of both homozygotes.

B  The dominant allele is not always expressed.

C  The alleles affect more than one trait.

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

E  The trait exhibits a continuous distribution.

A  is a carrier

B  cannot reproduce

C  will have children who are all carriers of cystic fibrosis

D  has cystic fibrosis

E  cannot have children with cystic fibrosis

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

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

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

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

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

A  Dd

B  DI

C  DD

D  dd

A  recessive

B  codominant

C  dominant

D  pleiotropic

E  incompletely dominant

A  autosomes

B  allosomes

C  centromeres

D  centrosomes

E  nonsexosomes

A  2 n + 1 or 2 n – 1

B  n + 1 only

C  n + 1 or n – 1

D  2 n – 1 only

E  2 n + 1 or n – 1

A  centromere

B  chromatin

C  centriole

D  centrosome

E  spindle

A  Identical in all ways.

B  genetically identical.

C  genetically different.

D  prepared to replicate chromosomes.

E  hexaploid

A  XYY

B  YOX

C  XOY

D  XY

E  XO

A  46

B  22

C  2

D  44

E  23

A  four

B  three

C  two

D  five

E  one

A  centrosomes

B  genomes

C  chromatids

D  centromeres

E  genes

A  centromeres

B  chiasma

C  chromosomes

D  nuclei

E  centrosomes