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WorksheetsGenetics Practice
Total questions: 30
Worksheet time: 27mins
Name
Class
Date
1.
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
2.
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)
Purebred
b)
Hybrid
3.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
4.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
5.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
6.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
7.
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
8.
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%
9.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
10.
Which of the following genotypes is a purebred?
a)
Bb
b)
Gg
c)
bb
d)
Dd
11.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
12.
the condensed form of DNA is called________________
a)
an allele
b)
a gene
c)
a chromosome
d)
a phenotype
13.
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
14.
In a punnet square where are the parent alleles written?
a)
Top and inside the boxes
b)
Only on the left and right side of the boxes.
c)
outside of the boxes (top and left side)
d)
All on the top side of the boxes
15.
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
a)
25%
b)
1%
c)
10%
d)
0%
16.
What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
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.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
19.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
20.
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
21.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
22.
A segment of DNA that codes for a protein
a)
gene
b)
allele
c)
protein
d)
trait
23.
Whose traits are on the outside of the punnett square?
a)
mom
b)
dad
c)
parents
d)
offspring
24.
What are the chances of a pea pod that is yellow?
a)
75%
b)
25%
25.
What is the phenotype with the genotype Aa?
a)
yellow pea pod
b)
green pea pod
26.
Looking at the punnett square and B is brown eyes and b is blue eyes. What chance is there that the offspring will have brown eyes?
a)
25%
b)
50%
c)
75%
d)
100%
27.
The X and Y chromosomes are known as the ___ chromosomes.
a)
sex
b)
autosome
c)
biological
d)
genetic
28.
A normal human has ___ pairs of autosomes and ___ pair(s) of sex chromosomes.
a)
23,1
b)
22,1
c)
1, 22
d)
1, 23
29.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
30.
Squidward has light blue skin, and his genotype for this trait is Bb. Which of the following would describe Squidward?
a)
Purebred
b)
Hybrid
c)
Homozygous
d)
Sex-linked
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