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Genetics

Total questions: 21

Worksheet time: 16mins

Name
Class
Date
1.

How many copies of each gene do you have?

a)

1

b)

2

c)

3

d)

4

2.

How many chromosomes are found in each cell of your body (excluding gametes)?

a)

46

b)

23

c)

40

d)

45

3.

Of the chromosomes in your cells, how many are sex chromosomes?

a)

1

b)

2

c)

3

d)

4

4.

What are genes?

a)

Pants

b)

Specific traits

c)

Sections of DNA arranged along the chromosomes

d)

Chromosomes

5.

Who is considered the "father" of modern genetics?

a)

Einstein

b)

Mendel

c)

Disney

d)

Washington

6.

The "F" represents familial generation in Mendel's experiments.

a)

True

b)

False

7.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
8.
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
9.

"The Great White Shark was 20 feet in length."

Phenotype or Genotype?

a)

phenotype

b)

genotype

10.
What type of "square" helps us solve genetic problems?
a)
carpenter square
b)
Mendel square
c)
Punnett square
d)
genetic square
11.

Which of the following genotypes is homozygous dominant?

a)

Yy

b)

yY

c)

yy

d)

YY

12.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
13.

TT, tt, PP, pp, SS, ss are examples of alleles that are _______?

a)

homozygous

b)

heterozygous

c)

different

d)

homologous

14.

In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of a plant that would produce white-flowers?

a)

rr

b)

rR

c)

RR

d)

Rr

15.
Y for yellow body is dominant over y for blue body.  What alleles would produce yellow bodies?
a)
YY,yy
b)
Yy,yy
c)
YY only
d)
YY,Yy
16.
Females-XX; MalesXY.  A couple has 4 girls.  What is the chance the next child will be a boy?
a)
75%
b)
100%
c)
25%
d)
50%
17.
B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
18.
If "T" is the allele for tall and "t" is the allele for short, then Tt would produce?
a)
tall
b)
short
c)
medium
d)
not enough info
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.
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
21.
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%

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