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Understanding Inheritance

Total questions: 75

Worksheet time: 48mins

Name
Class
Date
1.

________ is how a trait appears, or is expressed. The part we can see.

a)

Dominance

b)

Genotype

c)

Phenotype

d)

Polygenic Inheritance

2.

_______ are the different forms of a gene.

a)

Duplicates

b)

Genes

c)

Pairs

d)

Alleles

3.

A ________ is a section on a chromosome that has genetic information for one trait.

a)

Duplicate

b)

Gene

c)

Pair

d)

Allele

4.

The chromosomes inside you exist as ________, one from each of your parents.

a)

Duplicates

b)

Genes

c)

Pairs

d)

Alleles

5.

Scientists learned that __________ contain genetic information that controls traits.

a)

Chromosomes

b)

Genes

c)

Pairs

d)

Alleles

6.

One offspring does not affect the __________ of another offspring.

a)

Pedigree

b)

Phenotype

c)

Complete Dominance

d)

Genetic Make-up

7.

A __________ is a model used to predict possible genotypes and phenotypes of offspring.

a)

Pedigree

b)

Punnett Square

c)

Codominance

d)

Genetic Make-up

8.

_________ is when the two alleles of a gene are different. Rr

a)

Heterozygous

b)

Genotype

c)

Phenotype

d)

Homozygous

9.

__________ is when the two alleles of a gene are the same. RR and rr

a)

Heterozygous

b)

Genotype

c)

Phenotype

d)

Homozygous

10.

In __________, uppercase letters represent dominant alleles and lowercase letters represent recessive alleles.

a)

Cells

b)

Genotypes

c)

Genetics

d)

Symbols

11.

Scientists use _________ to represent alleles in a genotype.

a)

Genes

b)

Phenotypes

c)

Codominance

d)

Symbols

12.

__________ is the two alleles that control the phenotype of a trait.

a)

Genotype

b)

Phenotype

c)

Codominance

d)

Pairs

13.

"T" is dominant, "t" is recessive. If an organism has the genes "Tt."

Which will trait will result?

a)

"T" dominant

b)

"t" recessive

14.

"G" is dominant, "g" is recessive. If an organism has the genes "gg."

Which will trait will result?

a)

"G" dominant

b)

"g" recessive

15.

"M" is dominant, "m" is recessive. If an organism has the genes "MM."

Which will trait will result?

a)

"M" dominant

b)

"m" recessive

16.

Emily has brown hair.

Which most likely explains why Emily has brown hair?

a)

Emily’s favorite color is brown.

b)

Emily has a parent with brown hair.

c)

Emily’s older brother has brown hair.

17.

What should you use to predict the traits of offspring when you know the genes of two parents?

a)

a graph

b)

a flow chart

c)

a data table

d)

a Punnett square

18.

What is the probability of bb offspring?

a)

1/4

b)

2/4

c)

0/4

d)

4/4

19.

What allele combination should go in the missing box?

a)

AA

b)

Aa

c)

aa

d)

none of these

20.

An allele whose trait ALWAYS shows up in the organism as long as 1 allele is present.

a)

dominant

b)

recessive

c)

phenotype

d)

genotype

21.

An allele whose trait can be hidden (masked) if a different allele is present.

a)

dominant

b)

recessive

c)

phenotype

d)

genotype

22.

Represented by a capital letter.

a)

phenotype

b)

dominant allele

c)

recessive allele

d)

homozygous

23.

Green pod color is dominant over yellow pod color. The green pod allele is written as 'G.' How would you write the allele for yellow pod color?

a)

Y

b)

y

c)

G

d)

g

24.

An organism's physical appearance or visible traits.

a)

homozygous

b)

heterozygous

c)

genotype

d)

phenotype

25.

An organism's genetic makeup or allele combination.

a)

genotype

b)

phenotype

c)

dominant allele

d)

recessive allele

26.

An organism that has 2 identical alleles for a trait.

a)

dominant allele

b)

homozygous

c)

heterozygous

d)

phenotype

27.

A heterozygous genotype will ALWAYS express this phenotype.

a)

dominant

b)

recessive

c)

cannot be determined

28.

Which of the following would be an example of a correctly written heterozygous genotype?

a)

Gg

b)

Gy

c)

GG

d)

gg

29.

Round seed shape is dominant over wrinkled seed shape. Which of the following would be a recessive genotype?

a)

rr

b)

RR

c)

Rr

d)

wrinkled seed

30.

Tall plant height is dominant over short plant height. Which of the following would produce a short plant?

a)

TT

b)

Tt

c)

tt

d)

tT

31.

Tall plant height is dominant over short plant height. Which of the following is NOT a possible genotype?

a)

homozygous tall

b)

homozygous short

c)

heterozygous tall

d)

heterozygous short

32.

True or false: an organism with a recessive trait could have either a heterozygous or homozygous genotype.

a)

True

b)

False

33.

________ is how a trait appears, or is expressed. The part we can see.

a)

Alleles

b)

Genotype

c)

Phenotype

d)

Genes

34.
An allele that is masked when a dominant allele is present. The "weaker" gene. 
a)
Dominant Allele
b)
Recessive Allele
35.
An allele whose trait always shows up in the organism when the allele is present. The "stronger" gene. 
a)
Dominant Allele
b)
Recessive Allele
36.

An organism’s genetic makeup or allele combination.

Cannot be seen. It is the code inside

a)

Genotype

b)

Phenotype

c)

Beanotype

d)

Notype

37.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
38.

B = brown fur b = white fur

In the Punnett square, what are the genotypes

a)

Bb, bb

b)

Brown, white

c)

1:1

39.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
40.
Which of the following is a phenotype?
a)
Aa
b)
black hair
c)
heterozygous genes
d)
mutated DNA
41.

Which of the following is a genotype?

a)

Aa

b)

black hair

c)

heterozygous genes

d)

mutated DNA

42.
Both parents in this Punnet square
a)
are homozygous dominant
b)
are homozygous recessive
c)
are heterozygous
d)
have blue eyes
43.
How many boxes would say BB?
a)
1
b)
2
c)
4
d)
0
44.

What is the genotypic ratio here

a)

TT = 1, Tt= 2, tt=1

b)

all tall

c)

TT= 3 tt = 1

d)

Tt = 1

45.

To be a yellow seed, genotype must be

a)

aa

b)

Aa

c)

AA

d)

AA or Aa

46.
A Punnet Square will 
a)
tell you exactly what your offspring will look like
b)
increase the chance you pass on recessive traits
c)
predict genotypes and phenotypes in offspring
d)
have no purpose but for Taylor to give us extra assignments
47.

The Phenotypic ratio here is

a)

25% blue eye 75 % brown eye

b)

BB = 25% Bb = 50% bb = 25%

c)

BB= 50 % bb = 50%

d)

All brown eye

48.

In the punnett square shown, what is the genotypes of the father/mother

a)

RW and RR

b)

RW and WW

c)

RR and WW

d)

RW and RR

49.

Where are genes located

a)

chromosoms

b)

parents

c)

alleles

d)

nucleus

50.

B = brown fur b = white fur

In the Punnett square, what is the genotypic ratio

a)

Bb, bb

b)

Brown, white

c)

1:1

51.

Tall, Short

a)

Punnett Square

b)

Pedigrees

c)

Genotypes

d)

Phenotypes

52.

Gg, GG

a)

Punnett Square

b)

Pedigrees

c)

Genotypes

d)

Phenotypes

53.

A pea plant that is Yy for certain trait.... Yy is considered its....

a)

Genotype

b)

Phenotype

54.

A pea plant that is green..... Being ´green´ is considered its...

a)

Genotype

b)

Phenotype

55.

The two alleles that determine the physical appearance of a specific trait

a)

Genotype

b)

Phenotype

56.

A section of your DNA that code for a specific trait

a)

Chromosome

b)

Gene

c)

Allele

57.

Different forms of a gene

a)

Chromosomes

b)

Alleles

58.

What is the genotype Rr?

a)

Homozygous Dominant

b)

Homozygous Recessive

c)

Heterozygous

59.

What is the genotype ww?

a)

Homozygous Recessive

b)

Heterozygous

c)

Homozygous Dominant

60.

What is the genotype Bb?

a)

Heterozygous

b)

Homozygous Dominant

c)

Homozygous Recessive

61.

What is the genotype FF?

a)

Homozygous Recessive

b)

Homozygous Dominant

c)

Heterozygous

62.
Dominant or recessive?
tt
a)
Dominant 
b)
Recessive
63.
Dominant or recessive?
Dd
a)
Dominant
b)
recessive
c)
neither
d)
homozygous
64.
What are the possible combinations of a pea plant with the alleles PP and a male pea plant with the alleles pp.
P= purple
p= white
a)
all Pp
b)
all PP
c)
Pp,PP,Pp,PP
d)
all pp
65.
When the allele combination is a dominate and a recessive trait together which trait will be seen?
a)
Dominate
b)
Recessive
c)
none
d)
both
66.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
67.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
68.
Homozygous or heterozygous?
BB
a)
Homozygous
b)
Heterozygous
69.
In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?
a)
Tall = T
Short = S
b)
Tall = T
Short = t
c)
Tall = t
Short = T
d)
Tall = TT
Short = tt
70.
A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?
a)
0%
b)
25%
c)
50%
d)
75%
71.
Georgette wants to breed her pet phoenixes, but she isn't sure if the babies will burst into blue flames or red flames. Her documents show that her female phoenix is homozygous dominant for red flames, while her male phoenix is homozygous recessive for blue flames. What color flames will the babies have?
a)
Red
b)
Blue
c)
Purple
d)
50% Red, 50% Blue
72.
What is the probability of a purple-horned unicorn if a heterozygous pink-horned unicorn is crossed with a heterozygous pink-horned unicorn?
a)
0%
b)
25%
c)
50%
d)
75%
73.
Leonardo bet his friend Olivet that two heterozygous green-eyed sea monsters could not have a recessive blue-eyed baby sea monster. Olivet said they can have a blue-eyed sea monster.
Who wins the bet?
a)
Leonardo
b)
Olivet
c)
Both
d)
Neither
74.
Jabba the Hutt has finally decided to settle down and have a family. He has undergone genetic testing and learned that he is heterozygous for Hutt Fungal Syndrome, which is caused by recessive alleles. He is worried that his children might suffer from this syndrome. His Hutt mate has undergone genetic testing and discovered she is homozygous dominant for the syndrome. Should Jabba be worried?
a)
Yes
b)
No
75.
A Jawa notices that his beloved pet desert rat, who has brown fur, just had several rat babies, some of which had white fur and some which had brown fur. Brown fur is the dominant trait. This means his rat must have what genotype?
a)
Homozygous Dominant
b)
Heterozygous
c)
Homozygous Recessive

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