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Genetics Practice

Total questions: 19

Worksheet time: 12mins

Name
Class
Date
1.
The passing of traits from parent to offspring 
a)
Heredity 
b)
Genetics 
c)
Hybrid 
d)
Probability 
2.

Which is heterozygous ?

a)

Tt

b)

TT

3.

The genetic makeup of an organism; the genes

a)

heterozygous

b)

punnet square

c)

genotype

d)

phenotype

4.
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
5.

Squidward has light blue skin, and his genotype for this trait is Bb. Would Squidward be considered a purebred or hybrid for light blue skin?

a)

homozygous

b)

heterozygous

6.

An offspring will receive how many copies of a gene from each parent to determine a specific trait?

a)

one

b)

two

c)

three

d)

five

7.

What is a phenotype?

a)

The genetic make up or genes

b)

The physical trait or appearance

c)

The final offspring set of a parent

d)

The homozygous dominant combinations

8.

Having two of the same genes for the trait (sometimes called purebred).

a)

homozygous

b)

hetrozygous

c)

protein

d)

chromosome

9.

Having two different genes for a trait (sometimes called hybrid).

a)

protein

b)

homozygous

c)

heterozygous

d)

genotype

10.
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%
11.
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
12.

A gene whose trait only shows up when no dominant version is present.

a)

hidden trait

b)

dominant gene

c)

recessive gene

d)

present trait

13.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
14.
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
15.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
16.

The condensed form of DNA is called________________

a)

an allele

b)

a gene

c)

a chromosome

d)

a phenotype

17.
Which of the following is a phenotype?
a)
Bb
b)
Black fur
18.
What is the percentage of offspring that have green pods?
a)
100%
b)
75%
c)
50%
d)
25%
19.
The part of a chromosome that carries information for a certain trait is called a 
a)
protein
b)
gene 
c)
nucleus
d)
gametes