WorksheetsBY 322 Exam 1 Set 1
Total questions: 30
Worksheet time: 15mins
Name
Class
Date
1.
In the 1600s, William Harvey studied reproduction and development. What is the term given to his theory which states that an organism develops from the fertilized egg by a succession of developmental events that lead to an adult?
a)
preformation
b)
spontaneous generation
c)
cell theory
d)
transduction
e)
epigenesis
2.
Schleiden and Schwann proposed the cell theory which states that ________.
a)
cells contain genetic information in their nucleus
b)
cells move from the various parts of the body to the reproductive organs to produce offspring
c)
cells are derived from preexisting cells
d)
cells propagate via asexual reproduction
e)
cells represent the basic units of heredity
3.
In many species, there are two representatives of each chromosome. In such species, the characteristic number of chromosomes is called the ________ number. It is usually symbolized as ________.
a)
haploid; n
b)
haploid; 2n
c)
diploid; 2n
d)
diploid; n
e)
polyploid; n
4.
Living organisms are categorized into two major groups based on the presence or absence of a nucleus. What group is defined by the presence of a nucleus?
a)
eukaryotic organism
b)
virus
c)
eubacterium
d)
archaea
e)
bacteriophage
5.
The diploid chromosome number of an organism is usually represented as 2n. Humans have a diploid chromosome number of 46. What would be the expected haploid chromosome number in a human?
a)
92
b)
16
c)
12
d)
24
e)
23
6.
During interphase of the cell cycle, ________.
a)
centrioles migrate
b)
sister chromatids move to opposite poles
c)
the nuclear membrane disappears
d)
cytokinesis occurs
e)
DNA content essentially doubles
7.
Migration of chromosomes is made possible by the binding of the spindle to the ________.
a)
kinetochore
b)
telomere
c)
centriole
d)
equatorial plate
e)
centrosome
8.
Which protein directly holds the chromatid arms together prior to anaphase of mitosis?
a)
shugoshin
b)
cohesin
c)
separase
d)
middle lamella
e)
histone
9.
At which stage of cell division do sister chromatids go to opposite poles?
a)
mitotic anaphase and anaphase of meiosis I
b)
mitotic anaphase and anaphase of meiosis II
c)
anaphase of meiosis I only
d)
mitotic anaphase only
e)
when they don't get along
10.
During meiosis, chromosome number reduction takes place in ________.
a)
anaphase II
b)
anaphase I
c)
metaphase I
d)
prophase I
e)
telophase II
11.
The horse (Equus caballus) has 32 pairs of chromosomes, whereas the donkey (Equus asinus) has 31 pairs of chromosomes. How many chromosomes would be expected in the somatic tissue of a mule, which is a hybrid of these two animals?
a)
63
b)
64
c)
62
d)
60
e)
126
12.
Mendel utilized the garden pea, Pisum sativum for his studies based on features that include all but ________.
a)
easy to grow
b)
being able to hybridize artificially
c)
reaches maturity in a single season
d)
has visible features with a wide spectrum of intermediates
e)
can generate a large number of progeny
13.
Which of the following statements was not a contributing factor in the generation of Mendel's first three postulates?
a)
true-breeding plants were used for the parental generation
b)
all offspring of the first filial generation demonstrated the same trait
c)
reciprocal crosses did not change the patterns of inheritance
d)
the proposal that there are basic units of heredity to explain results of monohybrid crosses
e)
monohybrid crosses for several analyzed characteristics yielded similar patterns of inheritance
14.
The physical expression of a trait is referred to as a(n) ________.
a)
allele
b)
genotype
c)
phenotype
d)
gene
e)
homozygote
15.
The process that leads to the development of haploid gametes is best described as ________.
a)
segregation
b)
independent assortment
c)
Mendelian inheritance
d)
replication
e)
dominance or recessiveness
16.
Mendel indicated that traits were made up of unit factors. Today, we call unit factors ________.
a)
genotypes
b)
phenotypes
c)
alleles
d)
characters
e)
genes.
17.
Assuming a typical monohybrid cross in which one allele is completely dominant to the other, what phenotypic ratio is expected if the F1s are crossed?
a)
3:1
b)
2:1
c)
3:2
d)
4:3
e)
1:1
18.
Mendel crossed two pea plants with round seeds. All seeds of the offspring were round. He then crossed a plant with round seeds to a plant with wrinkled seeds and all offspring had wrinkled seeds. Which of the following is true?
a)
round is dominant
b)
wrinkled is dominant
c)
the plants he used were not true breeding
d)
a mutation occurred
e)
the trait does not breed true
19.
A recessive allele in dogs causes white spots. If two solid colored dogs are mated and produce a spotted offspring, what is the percentage chance their next puppy would be solid colored?
a)
0.25
b)
0.5
c)
about 66%
d)
0.75
e)
about 90%
20.
What is independent assortment?
a)
During gamete formation, a pair of unit factors segregates randomly from another pair of unit factors
b)
Fertilization is random
c)
During gamete formation, allele pairs are separated to form haploid gametes
d)
Genes lie on chromosomes
e)
Chromosomes can swap information during meiosis
21.
Under what conditions does one expect a 1:1:1:1 ratio?
a)
AABB × aabb
b)
AaBb × AaBb
c)
AaBb × aabb
d)
AAbb × aaBB
e)
Aabb × AABB
22.
How many different possible gametes can be obtained from an organism with the following genotype AaBbCc?
a)
3
b)
4
c)
8
d)
9
e)
16
23.
With incomplete dominance, a likely ratio resulting from a monohybrid cross would be ________.
a)
1:2
b)
1:2:2:4
c)
1:2:1
d)
9:3:3:1
e)
3:1
24.
The MN blood group is a codominant trait as a result of which of the following?
a)
presence of both M and N cell surface glycoproteins on the same blood cell
b)
presence of a M/N intermediate cell surface glycoprotein on blood cells
c)
presence of M cell surface glycoproteins on some blood cells and N glycoproteins on others
d)
presence of M, M/N intermediate, and N cell surface glycoproteins on blood cells
e)
presence of either M, M/N intermediate, or N cell surface glycoproteins on different blood cells
25.
Which of the following is not a characteristic of the ABO gene locus?
a)
multiple alleles
b)
dominance/recessiveness
c)
codominance
d)
epistasis
e)
four possible phenotypes
26.
The presence of more than two alternative forms of a given gene would be called ________.
a)
multiple alleles
b)
alternation of generations
c)
codominance
d)
incomplete dominance
e)
hemizygosity
27.
A couple each with blood type AB and normal pigmentation have a child with AB blood type and albinism. What is the probability that their next child will have the same phenotype as the first child?
a)
9/16
b)
3/16
c)
1/8
d)
1/4
e)
1/16
28.
A condition in which one gene pair masks the expression of a nonallelic gene pair is called ________.
a)
codominance
b)
epistasis
c)
dominance
d)
recessiveness
e)
additive alleles
29.
The phenomenon of a gene which has multiple phenotypic effects on an individual is referred to as ________.
a)
continuous variation
b)
pleiotropy
c)
expressivity
d)
penetrance
e)
epistasis
30.
Name the single individual whose work in the mid-1800s contributed to our understanding of the particulate nature of inheritance as well as the basic genetic transmission patterns. With what organism did this person work?
a)
Gregor Mendel; Pisum sativum
b)
George Beadle; Neurospora
c)
Thomas Hunt Morgan; Drosophila
d)
Calvin Bridges; Drosophila
e)
Boris Ephrussi; Ephestia
100 %
