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Genetics and Punnett Squares

Total questions: 42

Worksheet time: 42mins

Name
Class
Date
1.

What is a GENOTYPE?

a)

the genetic make-up of an organism

b)

the physical trait of an organism

c)

mitosis

d)

meiosis

2.

Which of the following are GENOTYPES? (select all correct answers)

a)

black hair

b)

homozygous dominant

c)

heterozygous

d)

blue eyes

e)

BB

3.

PHENOTYPE is

a)

the genetic make-up of an organism

b)

the physical trait of an organism

c)

nucleic acid

d)

Aa

4.

Which of the following are PHENOTYPES?

a)

green skin

b)

Aa

c)

homozygous recessive

d)

purple eyes

e)

black fur

5.

The prefix "homo" means

a)

different

b)

same

c)

tomorrow

d)

never

6.

The prefix "hetero" means

a)

different

b)

ugly

c)

fancy

d)

same

7.

Which of the following represents alleles for the homozygous dominant genotype?

a)

Aa

b)

aa

c)

AA

8.

Which of the following represents alleles for the homozygous recessive genotype?

a)

Aa

b)

aa

c)

AA

9.

Which of the following represents alleles for the heterozygous genotype?

a)

Aa

b)

aa

c)

AA

10.

If A = red fur and a = white fur, what color fur would Aa be? (Assume Mendelian inheritance)

a)

red

b)

white

c)

purple

d)

blue

11.

If A = red fur and a = white fur, what color fur would AA be? (Assume Mendelian inheritance)

a)

red

b)

white

c)

purple

d)

blue

12.

If A = red fur and a = white fur, what color fur would aa be? (Assume Mendelian inheritance)

a)

red

b)

white

c)

purple

d)

blue

13.

If A = red fur and a = white fur, what are the PHENOTYPIC ratios of the offspring based on the Punnett Square?

a)

25% heterozygous

b)

50% purple

c)

75% red fur and 25% white fur

d)

25% homozygous recessive, 50% heterozygous, 25% homozygous dominant

14.

If A = red fur and a = white fur, what are the GENOTYPIC ratios of the offspring based on the Punnett Square?

a)

25% heterozygous

b)

50% purple

c)

75% red fur and 25% white fur

d)

25% homozygous recessive, 50% heterozygous, 25% homozygous dominant

15.

If A = green pods and a = yellow pods, what are the GENOTYPIC RATIOS of the offspring in the Punnett square?

a)

100% green pods

b)

100% yellow pods

c)

100% heterozygous

d)

100% homozygous dominant

16.

If A = green pods and a = yellow pods, what are the PHENOTYPIC RATIOS of the offspring in the Punnett square?

a)

100% green pods

b)

100% yellow pods

c)

100% heterozygous

d)

100% homozygous dominant

17.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
18.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
19.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
20.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
21.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender 
d)
all of the above
22.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
23.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
24.
What is the yellow seed genotype?
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
25.
What is the genotypic ratio here?
a)
25% blue eye 75 % brown eye 
b)
BB = 25% Bb = 50% bb = 25%
c)
BB= 50 % bb = 50%
d)
All brown eye
26.
What genotype would go in box 2?
a)
BB
b)
Bb
c)
bb
27.
What genotype would go in box 3?
a)
BB
b)
Bb
c)
bb
28.
What genotype would go in box 1?
a)
BB
b)
Bb
c)
bb
29.

Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.

a)

Protein

b)

DNA

c)

RNA

d)

Glucose nucleic acid (GNA)

30.

In a Punnett Square, 1 box is equal to 25%. How much are 3 boxes equal to?

a)

25%

b)

50%

c)

75%

d)

100%

31.
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
32.

If T=tall and t=short

What is the ratio for short phenotype in this cross?

a)

0:4

b)

1:4

c)

2:4

d)

3:4

33.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
34.

In a certain species of plant, the color purple (P) is dominant to the color white (p).

According to the Punnett Square, what is the probability of an offspring being purple?

a)

25%

b)

0%

c)

100%

d)

50%

35.

Which of these Punnett squares represents a cross between a homozygous dominant parent and a heterozygous parent?

a)
b)
c)
d)
36.

A dog with straight fur (Bb) is crossed with a dog with curly fur (bb). What is the probability the offspring will have straight fur?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

37.

Who is considered the "father of genetics"?

a)

Reginald Punnett

b)

Gregor Mendel

c)

James Watson

d)

Charles Darwin

38.

Who is Gregor Mendel

a)

an Austrian Monk from the mid 1800s who contributed to the study of Genetics

b)

The scientist who discovered the structure of DNA

c)

a British scientist who discovered penicillin

d)

The scientist who used X-Ray Crystallography to shed light on the structure of DNA

39.

What did Gregor Mendel study?

a)

Mold Spores

b)

Pea Plants

c)

Sun Flowers

d)

Rats

40.
What did Mendel call the two kinds of traits exhibited by the pea plants (one coming from the father, one from the mother)?
a)
Genesis
b)
Elective traits
c)
Alleles
d)
Quadrants
41.
What do we call the table used to calculate the probability of an offspring's genotype?
a)
Punnett square
b)
Venn diagram
c)
Golden ratio
d)
Fibonacci sequence
42.
Gregor Mendel was born in what country
a)
Austraila
b)
Austria
c)
Africa
d)
Alaska

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