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Practice Unit 7 Genetic Inheritance

Total questions: 35

Worksheet time: 32mins

Name
Class
Date
1.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
2.
If a colorblind male marries a woman who is a carrier, what percentage of their FEMALE children will be colorblind?
a)
0%
b)
25%
c)
50%
d)
100%
3.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
4.
What is the genotype for this organism?
(E= 3 eyes, e= 1 eye)
a)
EE
b)
Ee
c)
ee
d)
EE or Ee
5.

B - black, b - brown. Two black mice mate and have some black and some brown mice. What is the genotype of the parents?

a)

BB x Bb

b)

BB x bb

c)

Bb x Bb

d)

Bb x bb

6.
Why does individual IV-7 have colorblindness?
a)
Because his mom is a carrier.
b)
Because his dad has it.
c)
Because his siblings have it.
d)
Because his uncle has it.
7.
Which of Mendel's laws states that alleles are distributed to gametes independent of one another?
a)
Law of Dominance
b)
Law of Segregation
c)
Law of Independent Assortment
d)
Law of Meiosis
8.
What type of inheritance is determined by multiple genes located at different loci on different chromosomes and there can be a range of traits?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
9.
If an organism’s diploid number is 46, what is its haploid number?
a)
2
b)
23
c)
46
d)
92
10.
The genotype of the affected son and daughter at the bottom of this pedigree...
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
Can't tell
11.
 Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
12.
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?
a)
100% Pp (purple)
b)
50% Pp (purple); 50% pp (white)
c)
75% Pp (purple); 25% pp (white)
d)
25% PP, 50% Pp, 25% pp
75% purple, 25% white
13.
Which represents the genotype of a homozygous condition?
a)
Bb
b)
BC
c)
bb
d)
bc
14.
A woman with blood genotype I(A)i marries a man with blood genotype I(B)i. What is the probability that they would have a child with type O blood?
a)
1/1
b)
1/2
c)
1/3
d)
1/4
15.
Pairs of genes that control the same trait are known as
a)
allelles
b)
gametes
c)
hybrids
d)
loci
16.
If the four existing children in a family are all sons, what chance would there be that the next child would also be a son?
a)
75%
b)
50%
c)
25%
d)
20%
17.
A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
18.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
19.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
20.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
a)
XHXh
b)
XhXh
c)
XHXH
d)
XhY
21.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
22.
A roan cow shows co-dominance in fur color (red and white). What is the expected phenotypic ratio if a roan cow and a roan steer mate together?
a)
100% Red
b)
1: Red : 1 White
c)
1 Red: 1 Roan
d)
1: Red: 2  Roan: 1 White
23.
A square filled in with color represents
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
24.
How many people in the pedigree show the phyenotype the trait being studied?
a)
10
b)
8
c)
2
d)
9
25.
What gametes can be made from this parents genes?
AaBb
a)
AA, aa, BB, bb
b)
AB, ab
c)
A, a, B, b
d)
AB, Ab, aB, ab
26.
Based on the Karyotype shown, at which chromosome pair can we identify a genetic disorder? 
a)
Chromosome pair 5
b)
sex chromosomes
c)
Chromosome pair 21
d)
There are no chromosomal disorders
27.
Which sex chromosomes would indicate a typical human male?
a)
XX
b)
X
c)
XY
d)
XXY
28.

Which process is represented by the diagram shown?

a)

germination

b)

fertilization

c)

mitotic cell division

d)

meiotic cell division

29.

During synapsis (crossing over), chromatids in homologous pairs of chromosomes often twist around each other, break, exchange segments, and rejoin. This process usually contributes to

a)

the formation of polyploid offspring

b)

nondisjunction of homologous chromosomes

c)

increased variability in offspring

d)

the production of identical twins

30.

Which statement describes how sex cells are different from other body cells?

a)

Sex cells have twice the genetic information of other body cells.

b)

Sex cells have only half the genetic information of other body cells

c)

Sex cells are made by the union of cells, and other body cells are made by cell division.

d)

Sex cells are used for growth, and other body cells are used for repair.

31.

Normal mitosis results in the formation of two nuclei that are genetically

a)

identical to each other and identical to the original nucleus

b)

identical to each other but different from the original nucleus

c)

different from each other but identical to the original nucleus

d)

different from each other and different from the original nucleus

32.
Which of the following occurs when chromosomes are replicated and synthesis of DNA molecules occurs? 
a)
S phase
b)
G1 phase
c)
G2 phase
d)
Mitosis
33.

What would you call the failure of one or more pairs of homologous chromosomes or sister chromatids to separate normally during meiosis?

a)

nondisjunction

b)

sex-linked

c)

nondiploidy

d)

karyotype

34.

check all that are true about mitosis

a)

4 daughter cells

b)

2 daughter cells

c)

gamete

d)

somatic

e)

identical to parent cell

35.

Hydrangea flower color depends on the pH of the soil. This is an example of

a)

pH causing a mutation

b)

pH regulating gene expression

c)

temperature regulating flower production

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