Bio Exam 3 Flashcards
Chromosomes in a karyotype can be characterized based on
size, banding pattern, shape
Trisomy 21 is more commonly known as
Down syndrome
Familial genetic histories are displayed by a series of connected circles and squares called a
pedigree chart
Parents that appear normal but are capable of having a child with a genetic disorder are called
carriers
If both parents have the sickle-cell trait (are heterozygous), what is the chance of a child also having the sickle-cell trait (being Heterozygous)
50%
Which of the following human traits is not a polygenic trait?
a) ABO blood type
b) eye color
c) height
d) skin color
e) these are all polygenic traits
ABO blood type
Varieties of plants in which self-fertilization produces offspring that are identical to the parents are referred to as
true-breeding
Which of the following people conducted the experiments that demonstrated that DNA is the genetic material of bacteriophages
a) Hershey and Chase
b) Franklin
c) Pauling
d) Watson and Crick
e) Wilkins
Hershey and Chase
The process of making a copy of DNA is called
Replication
Which of the following enzymes catalyzes the elongation of a new DNA strand?
a) single-stranded binding protein
b) RNA polymerase
c) Helicase
d) DNA polymerase
e) Ligase
DNA polymerase
DNA bases include all of the following except:
a) thymine
b) adenine
c) guanine
d) uracil
e) cytosine
uracil
In complementary base pairing of the DNA molecule, adenine always combines with
thymine
Which type of RNA forms the individual subunits of ribosomes?
rRNA
A nucleotide contains
A sugar, a phosphate, and a nitrogenous base
When one DNA molecule is copied (replicated) to make two DNA molecules, the new DNA contains
50% of the parent DNA
