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Heredity Quiz

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.
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
2.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
3.

Since human cells carry 2 copies of each chromosome (one from each parent), they have 2 versions of each gene; these versions of a gene are called ________ and can be dominant or recessive.

a)

alleles

b)

homologous chromosomes

c)

genome

d)

gene

4.

The passing of traits from parent to offspring is known as

a)

Heredity

b)

Genetics

c)

Hybrid

d)

Probability

5.

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

6.

A ____________ is a piece of DNA that codes for a trait and is the basic unit of heredity.

a)

Allele

b)

Gene

c)

Dominant Trait

d)

Recessive Trait

7.
What is the yellow seed genotype?
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
8.
Which of the following genotypes would be considered heterozygous?
a)
BB
b)
gg
c)
Ff
d)
TT
9.
Which of the following is a phenotype?
a)
Bb
b)
Black fur
10.
Is Bb dominant or recessive?
a)
dominant
b)
recessive
11.
Is bb dominant or recessive?
a)
dominant
b)
recessive
12.

Is "short" a genotype or phenotype?

a)

genotype

b)

phenotype

13.
Is AA a genotype or phenotype?
a)
genotype
b)
phenotype
14.
RR- round
rr-wrinkled
What is the phenotype for RR?
a)
wrinkled
b)
round
15.
RR- round
rr-wrinkled
What is the genotype for wrinkled?
a)
RR
b)
rr
c)
Rr
16.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
17.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
18.
B = brown eyes
b = blue eyes
What is true about these 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
19.

Proteins determine our

a)

intelligence

b)

physical traits

c)

DNA

d)

genes

20.

A section of DNA that codes for a protein.

a)
enzyme
b)
chromosome
c)
nucleotide
d)
gene