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WorksheetsCh. 18 Inheritance
Total questions: 59
Worksheet time: 2hrs 51mins
Name
Class
Date
1.
An organism's appearance or other detectable characteristic is a what?
a)
phenotype
b)
gene
c)
allele
d)
genetic variation
2.
The entire genetic makeup of an organism or the combination of genes for one or more specific traits is....
a)
genetic variation
b)
genotype
c)
gene
d)
allele
3.
If a plant with the genotype PP is crossed with a plant with the genotype pp, what are the possible genotypes of the offspring?
a)
PP, Pp, pP, pp
b)
PP. pp. pp. PP
c)
Pp, Pp, Pp, Pp
d)
Pp, PP, pp, PP
4.
What is the Punnett square used to predict?
a)
possible genotypes for the cross
b)
which traits are dominant
c)
which traits are recessive
d)
the number of offspring
5.
one of the alternative forms of a gene that governs a characteristic
a)
allele
b)
phenotype
c)
gene
d)
genetic variation
6.
When both alleles of a pair are alike, the organism is said to be
a)
Homozygous
b)
Heterozygous
c)
Homologous
d)
Heterologous
7.
If B=brown & and b=red, what would the genotype(s) be for an individual with brown hair?
a)
bb
b)
Bb
c)
BB
d)
BB and Bb
8.
The genotype "Tt" is
a)
Homozygous dominant
b)
Heterozygous
c)
Homozygous Recessive
9.
Looking at this pedigree, how many family members have the disease?
a)
4
b)
7
c)
All
d)
None
10.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
11.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
12.
Hemophilia is recessive. In this cross, what are the chances of any child having it?
a)
0%
b)
25%
c)
50%
d)
100%
13.
Which of the following would be an example of codominant inheritance in humans
a)
Type A
b)
Type AB
c)
Type O
d)
Type B
14.
A trait that can be hidden is
a)
recessive
b)
dominant
c)
homozygous
d)
heterozygous
15.
Long ears (E) are dominant over short ears (e). What's the long eared parent's genotype?
a)
EE
b)
Ee
c)
ee
d)
can't tell
16.
A plant with a genotype of Rr is
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
17.
If a phenotype expresses a recessive trait, then the genotype is
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
18.
In a cross between RR x rr, what would the genotypes of F1 be?
a)
RR and rr
b)
RR,Rr and rr
c)
RRrr
d)
only Rr
19.
Any observable trait is the individual's
a)
genetics
b)
genes
c)
genotype
d)
phenotype
20.
A different form or variety of a gene is also known as:
a)
allele
b)
homozygous
c)
recessive
d)
dominant
21.
Which term describes an individual with two identical alleles for a particular trait?
a)
homozygous
b)
heterozygous
c)
dominant
d)
recessive
22.
Having two of the same genes for the trait (TT, tt); Both dominant or both recessive.
a)
homozygous or purebred
b)
heterozygous or hybrid
c)
twin offspring
d)
pairs of chromosomes
23.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
24.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
25.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous genes
d)
mutated DNA
26.
Aa is
a)
homozygous (purebred)
b)
heterozygous (hybrid)
27.
B=brown eyes
b= blue eyes
What is true about these two brothers that have brown eyes:
One has genotype BB the other Bb.
b= blue eyes
What is true about these two brothers that have brown eyes:
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
28.
Where is DNA in a eukaryotic cell?
a)
Cytoplasm
b)
Cell membrane
c)
Nucleus
d)
Vacuole
29.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
30.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
31.
T = tall an t = short
TT and Tt would result in the following phenotype
TT and Tt would result in the following phenotype
a)
short
b)
tall
c)
medium sized
d)
neither tall or short
32.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender
d)
all of the above
33.
Two heterozygous (Tt)tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
34.
R=round seed
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?
a)
offspring will be Rr
b)
offspring will be RR
c)
round seeds will be recessive to wrinkled
d)
Wrinkled will be observed in half of offspring
35.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
36.
Pea plants can have green or yellow seeds. In a pea plant that is heterozygous for seed color, the allele for yellow seeds masks the effects of the allele of green seeds. Which of the following terms best describes the allele for yellow seeds?
a)
codominant
b)
recessive
c)
dominant
d)
sex-linked
37.
A human usually has _____ total chromosomes.
a)
6
b)
22
c)
4
d)
46
38.
Colorblindness is a recessive, X chromosome sex-link disorder. Cross the parents to figure out which percentage of their offspring will be colorblind.
a)
25%
b)
0%
c)
75%
d)
50%
39.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
40.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
41.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
42.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
43.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
44.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
45.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
46.
What type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")
(hint: check your notes - "modes of inheritance")
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive
47.
What determines gender in humans?
a)
the X and Y chromosome
b)
chromosome 21
c)
codominance
d)
epistasis
48.
Jackie is homozygous recessive for having dimples (D). What is her genotype?
a)
pp
b)
Dd
c)
dd
d)
DD
49.
Black hair is dominant to blonde hair which is recessive.
What is the phenotype for the following genotype?
bb
What is the phenotype for the following genotype?
bb
a)
Blonde hair
b)
black hair
c)
brown hair
50.
How many people in the pedigree are carriers for the disorder?
a)
6
b)
8
c)
2
d)
9
51.
A woman with Type B blood (whose father had type O blood) has children with a man who has Type O blood.
What percentage of their children could be expected to have Type O blood?
What percentage of their children could be expected to have Type O blood?
a)
100%
b)
50%
c)
25%
d)
75%
52.
______________ is a situation in which both alleles in a heterozygote have an effect on the phenotype.
a)
codominance
b)
incomplete dominance
c)
dominance
d)
homozygous
53.
Which blood types are codominant?
a)
IA and IB
b)
IA and IO
c)
IB and IO
d)
IAB and IBA
54.
A plant has two different alleles of a gene resulting in it having a green seed. Which row describes the phenotype and genotype of the seeds of this plant?
a)
A
b)
B
c)
C
d)
D
55.
Which sex chromosomes are present in all mature human sperm cells?
a)
both X and Y chromosomes
b)
either X or Y chromosomes
c)
only X chromosomes
d)
only Y chromosomes
56.
The shape of a person’s earlobes is determined by a single gene. This gene has dominant and recessive alleles. The allele for detached earlobes is dominant to the allele for attached earlobes. The diagram shows the inheritance of earlobe shape in a family. What is the probability that their next child will have detached earlobes?
a)
0%
b)
25%
c)
50%
d)
75%
57.
What defines a diploid nucleus?
a)
a nucleus containing two sets of chromosomes
b)
a nucleus containing two unpaired chromosomes
c)
a nucleus with two alternative forms of a gene
d)
a nucleus with two separate threads of DNA
58.
In an animal, the allele for straight fur is dominant to the allele for curly fur. A pair of these animals mate and have nine offspring with straight fur and three with curly fur. F represents the allele for straight fur and f represents the allele for curly fur. What are the most likely genotypes of the parents?
a)
F and f
b)
FF and ff
c)
FF and Ff
d)
Ff and Ff
59.
Most birds have a coloured pigment in their feathers, but in a few individuals, pigment is absent and the birds are albinos. Albinism occurs when a bird is homozygous recessive for the gene which creates the coloured pigment. If two albino birds mated, what describes the appearance of their offspring?
a)
all albino
b)
all coloured
c)
50% colored and 50% albino
d)
75% colored and 25% albino
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