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Genetics Review

Total questions: 45

Worksheet time: 25mins

Name
Class
Date
1.
The passing of traits from parent to offspring 
a)
Heredity 
b)
Genetics 
c)
Hybrid 
d)
Probability 
2.

Who was the father of genetics

a)

Charles Darwin

b)

Issac Newton

c)

Gregor Mendel

d)

Gandalf

3.
 which is heterozygous ?  
a)
Tt
b)
TT
4.
Which is homozygous ?
a)
Zz
b)
SS
5.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
6.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
7.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
8.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
9.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
10.
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
11.
Sex cells are produced through the process of
a)
mitosis
b)
cytokinesis
c)
binary fission
d)
meiosis
12.
The physical appearance of the allele combination the offspring receives
a)
genotype
b)
homozygous
c)
phenotype
d)
dominant
13.
What are the parents' genotypes?
a)
Homozygous for brown eyes
b)
Heterozygous for brown eyes
c)
Homozygous for blue eyes
d)
Heterozygous for blue eyes
14.
A section of the DNA strand that determines a specific trait
a)
gene
b)
trait
c)
chromosome
d)
allele
15.
Tallness is dominant in pea plants and is represented by "T." What would the genotype be for a homozygous tall plant?
a)
Tt
b)
tt
c)
TT
d)
Tall 
16.

The branch of science that deals with genes and heredity and variation in living things.

a)

genetic engineering

b)

gene therapy

c)

genetics

d)

genomics

17.

The trait or outward appearance observed in organisms.

a)

neophyte

b)

phenotype

c)

epiphyte

d)

genotype

18.

One or two more alternative forms of a gene.

a)

allele

b)

genome

c)

chromosome

d)

DNA

19.

Based on the karyotype, what is the sex of this person?

a)

Male

b)

Female

20.
A black cat mates with a white cat and their kittens all come out black and white speckled. This is an example of which of the following?
a)
Dominant
b)
Recessive
c)
Incomplete Dominance
d)
Codominance
21.

So the boy smurf genotype is BBEE and the girl’s genotype is bbee. If they mate what is the genotype of the F1 offspring they produce?

a)

BbEe

b)

BBEE

c)

BbEE

d)

bbEe

22.

Which of the following traits are not purebred for at least one trait?

a)

BbHh

b)

Bbhh

c)

BBHH

d)

BBHh

23.

In cocker spaniels the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown cocker spaniel is crossed with a heterozygous black cocker spaniel, which of the following genotypic ratios can be expected.

a)

0 BB: 2 Bb: 2 bb

b)

1 BB: 2 Bb: 1 bb

c)

2 BB: 0 Bb: 2 bb

d)

2 BB: 1 Bb: 0 bb

24.

The chromosome number is ______ during meiosis.

a)

doubled

b)

cut in half

c)

tripled

d)

stable

25.

Two pink-flowered plants are crossed. Some offspring are red, some are white, and some are pink. What type of inheritance pattern is this?

a)

codominance

b)

multiple alleles

c)

polygenic

d)

incomplete dominance

26.

Daughter cells formed during meiosis are

a)

diploid

b)

haploid

c)

triploid

d)

fused

27.

Which of the following cells are haploid?

a)

sperm

b)

white blood cells

c)

muscle cells

d)

liver cells

28.

The diploid (2n) number for humans is

a)

23

b)

46

c)

92

d)

none of these

29.

Which is an example of codominance?

a)

red + white = pink

b)

roan coloration in cattle (some red hair, some white hair)

c)

dihybrid crosses

d)

blue + yellow = green

30.

When tetrads exchange portions of their chromatids during meiosis it is called

a)

switching over

b)

crossing over

c)

asexual reproduction

d)

the law of segregation

31.

Which is NOT a possible gamete for AaBb?

a)

AB

b)

Ab

c)

aB

d)

bb

32.

Which parental combination could produce a kid with type O blood?

a)

type A x type AB

b)

heterozygous A x homozygous B

c)

type A x type B

d)

type O x type AB

33.

Gametes are

a)

sex cells

b)

diploid

c)

somatic cells

d)

phenotype

34.

Process of making gametes

a)

mitosis

b)

meiosis

c)

homologous

d)

asexual reproduction

35.

Type of inheritance shown regarding human blood

a)

incomplete dominance

b)

multiple alleles

c)

gamete

d)

diploid

36.

Alleles of different genes separate independently of one another

a)

multiple alleles

b)

asexual reproduction

c)

independent assortment

d)

genotype

37.

Tetrads are made up of

a)

non-homologous pairs

b)

homologous pairs

38.

For blood type A, this is I^A i or I^A I^A

a)

phenotype

b)

genotype

c)

multiple alleles

d)

2n

39.

Which of the following is an example of a homozygous dominant genotype?

a)

Aa

b)

aa

c)

AA

d)

Ab

40.

If red and white hair are codominant, what is the genotype of a roan (both red and white hairs present)?

a)

RR

b)

WW

c)

RW

41.

Colorblindness is much more common in males because

a)

the gene is located on the Y chromosome

b)

the gene is on the X chromosome and males have two Xs

c)

the gene is on the X chromosome and males only have one X

d)

males have a "back-up" X chromosome while females do not

42.

The diagram represents ______ because _____________________

a)

mitosis ; identical daughter cells are produced

b)

meiosis ; identical daughter cells are produced

c)

mitosis ; daughter cells with half the number of chromosomes are produced

d)

meiosis ; daughter cells with half the number of chromosomes are produced

43.

Which of the following is a blue heeler?

a)
b)
c)
d)
44.

If you take the haploid number for humans and add 7, then subtract the normal number of sex chromosomes in humans - what do you get?

a)

51

b)

50

c)

28

d)

27

45.

If being a muggle is dominant over being a wizard, what is the probability that two heterozygous muggles have a wizard baby?

a)

100%

b)

75%

c)

50%

d)

25%

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