SPRING 2006
GOOD LUCK!
READ ALL ANSWERS BEFORE MAKING A CHOICE
1.
Which of the following would be a correct statement concerning chromosome
numbers in the human sperm?
a) haploid, 46 chromosomes 0 pair
b) haploid, 23 chromosomes 23 pair
c) diploid, 23 chromosomes 0 pair
d) haploid, 23 chromosomes 0 pair
e) haploid, 23 chromosomes 0 pair
2.
Which of the following would be a correct statement concerning chromosome
numbers in the human female somatic cell?
a) 46 autosomes 2 sex chromosomes
b) 22 autosomes and 1 sex chromosome
c) 23 pair autosomes and 2 X chromosomes
d) 22 pair autosomes and X and Y chromosome
e) 22 pair autosomes and 2 X chromosomes
3.
One of the alternative forms of the same functional gene responsible for
one of two or
more contrasting traits. (Example Aa, bb, etc)
a) loci
c) alleles
b) homologs
d) chromosomes
4. Which of the following genotypes
represent heterozygous dominant ?
a) AA
d) AB
b) aa
e) aB
c) Aa
5.
If a pea has purple fowers and it is known
that purple is dominant over white,
then using "P" as a symbol for the dominant allele, indicate
ALL possible genotypes
for the "purple" phenotype.
a) PP, Pp
d) Pp, pp
b) PP only
e) pp only
c) PP, pp
6.
What are all the possible genotype of the egg or sperm cell
(gamete) from a
diploid organism with the genotype AaBb?
a) Ab, ab, Ab, aB
d) Ab, Bb
b) AaBb
e) Aa, Bb, bb, aa
c) Ab, AB, aB, ab
7. Incomplete
dominance (partial), RR = red; Rr = pink; rr = white. What
would
be the genotypes of the parents when it was observed that the
F1 has 23 Red, 54
pink and 24 white for these parents?
a) Rr and Rr
d) rr and rr
b) RR and rr
e) Rr and rr
c) Rr and RR
Questions 8 & 9:
A plant bearing large leaves is crossed with a true- breeding homozygous
recessive small leaf plant.
All of the plants in the F1 generation produced
small leaves.
One of the F1 plants
was allowed to self pollinate (cross fertilize) to produce
F2.
8.
What proportion of "F2" will have large leaves ?
a) 100%
d) 25%
b) 75%
e) none
c) 50%
9.
What proportion of "F2" will have the homozygous dominant genotype
?
a) 100%
d) 25%
b) 75%
e) none
c) 50%
10. In pea plants (YY,Yy) represents
yellow seeds and (yy) represents green seeds. A
pea plant with yellow seeds is crossed with one of green
seeds. The resulting off?
spring have about equal numbers of yellow and green seeded
plants. Give the
genotypes of the parents.
a) Yy x Yy
d) yy x yy
b) Yy x yy
e) YY x yy
c) YY x Yy
11.
Assume that in summer squash Yellow (YY,Yy) and disk shape (DD, Dd) are
dominant over green (yy) and sphere (dd). Give the genotypes of parents
when one
parent is yellow disk shaped and the other is yellow and sphere.
These parents
when crossed produced the following offspring:
3 yellow and disk, 1 green and
sphere,1 green and disk and 3 yellow and sphere ratio
a) YyDD x YyDd
d) yyDd x YyDd
b) YYDD x YYDD
e) YyDd x YyDd
c) YyDd x Yydd
12. It
is known that a child's blood type is inherited from the parents.
Consider the
case of the child who has O?type blood when the mother has A?type
and the father
has B?type blood. What would be the genotypes of the parents?
a) IA io x IA IB
d) IA io x IB io
b) IA IA x io io
e) IA iB x IBiB
c) IA IA x iA io
13. What genotypic blood type must parents have
in order to produce offspring of
blood type A, blood type AB, and type B blood only?
a) IA io x IA IB
d) IA io x IB io
b) IA IA x io io
e) IA iB x IBiB
c) IA IA x iA io
14.
A man not having hemophilia marries a woman who also does not have
hemophilia but is known to carry the gene for hemophilia. What are
the chances
that their girls will have hemophilia?
a) 100 %
d) 10 %
b) 50 %
e) 0 %
c) 75 %
15. Assume that in
Drosophilia, gray body (GG, Gg) is dominant over ebony (gg).
What
is the genotype of the Drosopholia parents if a gray body male is
crossed with a gray
body female producing the following offspring:
78 gray body individuals
23 ebony body individuals
a) GG x gg
d) Gg x GG
b) gg x gg
e) Gg x Gg
c) GG x GG
16.
In humans the sex of the offspring is determined by ___.
a) the mother
c) both the mother and father
b) the father
d) neither the mother nor father
17. Based
on conventional abbreviations for genes and alleles, identify the following:
AbCdE
a) genotype of a diploid cell showing 5 sets of genes
b) genotype of a diploid cell showing one set of gene consisting of 5 alleles
c) genotype of a gamete indicating one allele of 5 genes
d) genotype of a gamete indicating one gene consisting of 5 alleles
18. Based
on conventional abbreviations for genes and alleles, Identify the following:
AaBbCCDD
a) genotype of a diploid cell showing 4 sets of genes
b) genotype of a diploid cell showing one set of gene consisting of 4 alleles
c) genotype of a gamete indicating one allele of 4 genes
d) genotype of a haploid cell indicating one gene consisting of 4 alleles
19- 21. Based on the
following cross: P1 AaBb x P2 aabb
. complete dominance,
genes located on separate chromosomes
AA, Aa = red flower color and aa = white flower color
BB, Bb = smooth petal texture and bb = rough petal texture
19. What would be the genotype ratio:
a) 1 AaBb:1 Aabb:1 aaBb:1 aabb
d) 3 AaBb:1 Aabb:3 aaBb:1 aabb
b) 9AaBb: 3 Aabb:3 aaBb:1 aabb
e) 3 AaBb:1 aabb
c) 1 AaBb:1 aabb
20. What would be the phenotype ratio?
a) 9 red and smooth:3 red and rough:3 white and smooth:1 white and rough
b) 1 red and smooth:1 red and rough:1 white and smooth:1 white and rough
c) 3 red and smooth:1 red and rough:3 white and smooth:1 white and rough
d) 3 red and smooth:1white and rough
e) 1 red and smooth and :1 white and rough
21. If P1 above is the male how many different types of sperm can
be formed by these
two sets of genes ?
a) 1
d) 4
b) 2
e) 8
c) 5
22. In fruit
flies Red is dominant over white and can be represented by RR or
Rr. RR
represents the???.
a) genotype
c) loci
b) phenotype
d) allele
23. Carriers
of the sex linked red green colored blind trait include:
a) men who are heterozygous for the trait
b) men who are homozygous recessive for the trait
c) women who are heterozygous for the trait
d) women who are homozygous recessive for the the trait
e) all the above
24. Parents with the
genotype Io Io x IA IB produce offspring
with which blood
types?
a) type A and B only
c) type A, B, O only
b) type A, B, AB only
d) type A, B ,AB ,O
25. Assume fur color
black (BB) is incomplete over white (bb) in guinea
pigs.
What would be the phenotypic ratio of the F1 if
the parents are both
heterozygous gray?
a) 1 black to 1 brown to 1 gray
b) 2 black to 1 brown
c) 3 black to 1 gray
d) 1 black to 2 gray to 1 white
e) 1BB to 2 Bb to 1 bb
26. Which parents listed
below could produce children with all four blood types (A, B, AB,
O)?.
a) IO IO x IA IB
c) IB Io x IA IB
b) IO IO x IA IO
d) IA Io x IB Io
27. If 50 out of 100 offspring
expressed dominant traits and only one gene with two alleles
controlled this trait, the parents were probably_____.
a) both homozygous dominant
d) one homozygous dominant and
b) both homozygous recessive
the other heterozygous
c) both heterozygous dominant
e) one homozygous recessive and the
other heterozygous
28. Use (TT or Tt) for tall and
(tt) for dwarf. Which parents would give you a 1:1
phenotype ratio?
a) Tt and tt
c) Tt and TT
b) Tt and Tt
d) both tt
29. Red (RR or Rr) flower color
is dominant over white (rr) flower color.. A red
flowered plant was crossed with another red flowered plant. About
25 of the
offspring were white flowered plant and
75 red flowered plants. What are the
probable genotypes of the parents.
a) RR and rr
c) Rr and Rr
b) Rr and rr
d) Both RR
30. What are
all the possible genotypes of the egg or sperm cell from a diploid
organism
with the genotype Aabb?
a) Aa, ab
d) Ab, ab
b) AB, AB, ab
e) Aa, bb
c) AB, Ab, aB, ab
31.
When one studies two traits at a time is known as:
a) multiple alleles
d) dihybrid cross
b) dihybrid drift
e) sex linked recessive
c) monohybrid cross
32. In humans the gene for red green colored blindness is
located on the sex
chromosomes. Normal vision (CC or Cc) is dominant to color blind (cc).
Give the possible genotypes of both parents have the following offspring:
2 colored blind boys
3 normal vision females
2 normal vision boys
2 colored blind females
a) XC Xc x XCY
d) XC Xc x XcY
b) XCXC x XCY
e) Xc Xc x XCY
c) XcXc x XcY
33. Normal vision (C) is dominant over color blind (c). This gene
is located on the
sex chromosome. A normal vision man and woman produce three boys, one of
which is color blind and the other two with normal vision. What are
the genotypes
of the parents.
a) XC Xc x XCY
b) XCXC x XCY
c) XcXc x XcY
34. Consider the following parents:
XHXh x XHY
What percent of the male's sperm contain the Xh allele?
a) 0
c) 50
b) 25
d) 100
35 - 39 Question pertain to the following: A plant bearing red
flowers was crossed to a plant
bearing white flowers (P1 and P2). All of their offspring produced
pink flowers (F1).
When two of the pink flower bearing plants (F1) were crossed, red,
white and pink
flower (F2) bearing plants were produced.
35. Which of the following describes the process occurring during these crosses?
a)
complete dominance
b) incomplete dominance (blending)
c) codominance
d) sex linked traits
e) multiple alleles
36. What is the phenotype ratio of the F2 generation?
a) 1 red:1 white
d) 1pink: 2 red 1 white
b) 3 red :1 pink
e) all pink
c) 1red:2 pink:1 white
37. What is the
genotype of the F2 generation?
a) 1 Rr :1 rr
d) 1 RR:1 Rr:1 rr
b) 3 RR: 1 rr
e) all Rr
c) 1 RR:2 Rr :1 rr
38. What are the genotypes of the original parents?
a) RR and Rr
d) RR and RR
b) RR and rr
e) rr and rr
c) Rr and Rr
39. What percent of the F2 offspring would you expect to be pink?
a) 10
d) 75
b) 25
e) 90
c) 50
40 - 44 Match the following terms to its correct description.
a) polygenic inheritance
d) multiple alleles
b) complete dominance
e) sex linkage
c) incomplete dominance
40. Genes located on the X and Y chromosomes.
41. The heterozygous gene condition forms a blending of the two homozygous gene condition.
42. Three or more alleles may form different traits.
43. One allele will mask or cover up another allele.
44. Many phenotypes such as human eye color is determined by two
or more genes producing
several phenotypes, this is called____.
45 - 47. Consider the following genotype: AabbCcDDeeFF
45 . How many genes are represented in this genotype?
a) 4
d) 24
b) 8
e) 26
c) 12
46. After meiosis how many different types of gametes (genotypically) may be produced for the given genes?
a) 2
d) 16
b) 4
e) 64
c) 8
47. The genotype from question 45-47 above represents a _______ cell.
a) diploid
b) haploid