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Genetics Vocab Practice

Total questions: 37

Worksheet time: 1hrs 21mins

Name
Class
Date
1.

Define Alleles

a)

Molecule which contains the genetic information for an organism.

b)

Different versions of the same gene.

c)

all the chromosomes/DNA that code for an individual’s traits.

d)

Condensed DNA that is visible during cell division.

2.

A genotype describes the physical characteristics of an individual.

a)

True

b)

False

3.

A phenotype describes the genetic make-up of an individual.

a)

True

b)

False

4.

When Mendel crossed true-breeding tall plants (TT) with true-breeding short plants (tt), all of the offspring were tall because...

a)

The allele for tall plants is recessive.

b)

The allele for short plants is dominant.

c)

The allele for tall plants is dominant

5.

What is the relationship between phenotype and genotype?

a)

The phenotype determines the genotype.

b)

The genotype determines the phenotype.

c)

There is no relationship between phenotype and genotype.

6.

Tt is an example of...

a)

Homozygous Dominant

b)

Heterozygous

c)

Homozygous Recessive

7.
What is a phenotype?
a)
DNA
b)
Physical traits (the physical expression of a genotype)
c)
It's the same thing as a genotype
d)
Something that tastes delicious
8.
What is a trait?
a)
A general structure of an organism.
b)
A general behavior of an organism.
c)
A specific example of a feature expressed by an organism.
d)
It is found only on the DNA in the nucleus.
9.
This is the passing of traits from parent to offspring.
a)
Biology
b)
Genes
c)
Heredity
d)
Punnett squares
10.
Different forms of genes are called
a)
Punnett squares
b)
Chromosomes
c)
Alleles
d)
DNA
11.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
12.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
13.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
14.

A segment of DNA that codes for a protein

a)

gene

b)

allele

c)

protein

d)

trait

15.
The X and Y chromosomes are known as the ___ chromosomes.
a)
sex
b)
autosome
c)
biological
d)
genetic
16.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
17.

Hair color and eye color are examples of a person's....

a)

recessive traits

b)

dominant alleles

c)

genotype

d)

phenotype

18.
Genes are made of a pair of ____
a)
DNA
b)
Chromosome
c)
Alleles
d)
Phenotype
19.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
20.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
21.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
22.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
23.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
24.
Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit?
a)
height
b)
the scar
c)
ability to swim
d)
ability to play drums
25.

Monsters with red skin have the dominant trait. Which of the following could be the genotype of this monster?

a)

rr

b)

red skin

c)

Rr

d)

RR

26.
Axial flowers is dominant to terminal. What is the probabilty of offspring being terminal?
a)
1/4
b)
2/4
c)
3/4
d)
4/4
27.
How many boxes would say BB?
a)
1
b)
2
c)
4
d)
0
28.

Brown is dominant to green. What is the probability of these parents having green offspring?

a)

1/4

b)

2/4

c)

3/4

d)

4/4

29.
In rabbits, black fur (B) is dominant over brown fur (b). If a rabbit has brown fur, what can you conclude about its genotype?
a)
It is BB.
b)
It is Bb
c)
It is brown
d)
It is bb.
30.

A father has brown hair (B), but the offspring have red hair (a recessive trait), like their mother (b). How is this possible?

a)

It's not the real mother

b)

It can't be the real father

c)

The mother carries the dominant trait (Bb)

d)

The father carries the recessive trait as well (Bb)

31.

A homozygous brown mouse is crossed with a heterozygous brown mouse (tan is the recessive color).


Perform a punnett square cross and determine the phenotype & %.

a)

100 % tan

b)

100 % brown

c)

50 % brown and 50% tan

d)

75 % brown and 25 % tan

32.

What genotype(s) may result from crossing a homozygous dominant purple pea plant with a homozygous recessive purple pea plant?

a)

PP

b)

Pp

c)

pp

33.

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%

e)

100%

34.

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%

e)

100%

35.
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
36.
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
37.
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

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