1. Two true breeding parents are crossed similar to
Mendel's P generation. A tall plant is crossed with a short plant. What is the
expected outcome for the F1 generation?
A. all
short
B. all
tall
C. all
medium height
D. half
tall, half short
2. If the cross from #1 is continued, what would be the
expected outcome in the F2 generation?
A. all
short
B. all
tall
C. 3
tall, 1 short
D. half
tall, half short
3. If a plant that has round seeds has a parent that has
wrinkled seeds, what is its genotype? (Assume
that round is dominant.)
A.
RR
B.
Rr
C.
rr
D.
RrWw
4. This principle states that alleles separate during
gamete formation:
A. principle
of multiple alleles
B. principle
of dominance and recessiveness
C. principle
of independent assortment
D. principle
of segregation
5. If you crossed two heterozygous plants, how many of
the offspring will also be heterozygous?
A. all
B. half
C. 3/4
D. 1/4
6. A plant that has purple flowers is crossed with one
that has white flowers. The offspring were half white and half purple. What
were the genotypes of the parents?
A. Pp
x pp
B. Pp
x Pp
C. PP
x pp
D. PP
x WW
7. A dihybrid cross (AaBb x AaBb) will result in what
offspring ratio?
A. 4:4:2:2
B. 1:3:1
C. 3:1
D. 9:3:3:1
8. Phenotype refers to an organism's:
A. genetic
code
B. physical
appearance
C. ratio
D. parents
9. In each case where Mendel crossed true breeding plants
as parents, the offspring displayed only one of the two traits seen in the
parents. This observation supports which principle of genetics?
A. segregation
B. independent
assortment
C. dominance
and recessiveness
D. allele
frequency
10. Which of the following outcomes would you expect from
the following cross: tall, round (TTRR) x short, wrinkled (ttrr)
A. all
offspring tall and round
B. all
offspring short and wrinkled
C. half
tall, round; half short wrinkled
D. 9:3:3:1
11.
An epistatic allele in labrador retrievers
ensures that ee lab pups are yellow. Two other alleles control coat color,
where black is dominant to brown. How many yellow pups would you expect from a
parental cross where one parent was yellow (Bbee) and the other was
heterozygous black.
A.
1/8
B.
1/2
C.
3/8
D.
1/4
12.
In mice, agouti coat color is codominant. Hairs,
when viewed under a microscope are grey at the base and white at the tip. An
agouti mouse will result from a cross between a black parent and a white
parent. What will two agouti mice produce?
A.
all agouti offspring
B.
half black, half agouti offspring
C.
half agouti offspring, 1/4 white, 1/4 black
D.
half black, half white offspring
13.
A type of muscular dystrophy is sex linked. If a
woman is a carrier for the disease, what proportion of her SONS will have the
disease.
A.
all
B.
1/2
C.
1/4
D.
3/4
14.
A farmer discovers an oddity among his sheep
where some of the sheep have abnormally large eyes and bowed legs. Crosses of
these sheep show that 2/3 of the offspring have a normal phenotype and 1/3 have
the abnormal phenotype. What is the best explanation for the type of
inheritance that occurs here?
A.
the allele is lethal in its dominant form
B.
the allele is completely recessive
C.
the allele is codominant
D.
the allele is dominant
15.
The farmer is still unsure with his conclusions
so he breeds more sheep together. Out of 100 matings, 35 are abnormal. How can
he verifiy his hypothesis?
A.
use the hardy-weinberg equation
B.
develop a mouse-model of the gene
C.
perform a chi square analysis
D.
clone the abnormal sheep
16.
In cats, the gene for calico coat color is both
codominant and sex-linked. If a black and yellow cat are mated, what will be
the result?
A.
all female offspring will be calico
B.
all male offspring will be calico
C.
half of the females will be calico, half of the
males will be calico
D.
all the male offspring will be black
17.
A man with hemophilia (sex linked) lives a full
life through modern medicine. He eventually marries and wants to have children,
but his wife is worried that their children will have the disease. What
phenotypes are likely in their children?
A.
all of the sons will have hemophilia
B.
half of the sons will have hemophilia
C.
all of the daughters will have hemophilia
D.
none of the children will have the disease
(assuming his wife is not a carrier)
18.
Which of the following is a trait that is
controlled by multiple alleles?
A.
hemophilia
B.
blood type
C.
hitchhiker's thumb
D.
cystic fibrosis
19.
If a man has blood type O and his wife has blood
type AB, what blood types are possible among their children?
A.
A only
B.
B only
C.
A and B
D.
only
20.
Dwarfism is a dominant allele that
is also lethal in a homozygous state. If two dwarfs are married, what are the
odds that their child will not be viable (able to survive)
A.
1/2
B.
1/4
C.
3/4
D.
1/8
21. A human being has _____ autosomes and ______
sex chromosomes
A.
23, 1
B.
22 pairs, 1 pair
C.
23, 23
D.
2, 2
22. A section of chromosomes that codes
for a trait can be called a(n):
A.
nucleotide
B.
base-pair
C.
gene
D.
nucleus
23. Somatic
cells of a human have ____ chromosomes and are called ____
A.
10, haploid
B.
92, diploid
C.
23, haploid
D.
46, diploid
24. A person
who receives an extra chromosome, could have:
A.
Heightened intelligence
B.
Down Syndrome
C.
Red eyes
D.
Polygenic traits
25. Each
chromosome consists of two identical:
A.
genes
B.
nuclei
C.
chromatids
D.
bases
26. If a
person receives an X and a Y chromosome, that person is:
A.
female
B.
male
C.
red eyed
D.
mentally challenged
27. Two
alleles for pea plant height are designated T (tall) and t (dwarf). These
alleles are found on:
A.
genes
B.
sex chromosomes
C.
ribosomes
D.
homologous chromosomes
28. An animal
has 40 chromosomes in its gametes, how many chromosomes would you expect to
find in this animal's brain cells?
A.
1
B.
20
C.
40
D.
80
29. A picture
of a person's chromosomes is called a(n):
A.
karyotype
B.
syndrome
C.
chromatin
D.
fingerprint
30. During
which phase of mitosis is DNA replicated?
A.
interphase
B.
prophase
C.
anaphase
D.
telophase
31 Consider the following traits: Widow's peak (dominant) and Tongue
twisting (recessive). If a person is Pptt is married to a person who is ppTt,
what proportion of their offspring will have a widow's peak and can twist their
tongue?
A.
1/2
B.
1/16
C.
1/4
D.
3/16
