WorksheetsGenetics and Heredity
Total questions: 30
Worksheet time: 29mins
Name
Class
Date
1.
True or False When B = Dominant brown eyes and b = recessive blue eyes: The genotype BB or Bb will have a phenotype of blue eyes.
a)
true
b)
false
2.
True or False - When a single gene controls a trait the dominant allele on a gene will control the phenotype (i.e., what you see).
a)
true
b)
false
3.
8. D = dominant trait chin dimple and d = recessive trait no chin dimple. Which genotype (i.e., allele combination) will create an individual with no chin dimple?
a)
DD, Dd
b)
DD
c)
Dd
d)
dd
4.
Homozygous means . . . .
a)
similar or the same
b)
drastically different
c)
different
5.
Heterozygous means . . . . . .
a)
similar or the same
b)
different
c)
exactly the same
6.
What is the probability of the children being homozygous?
a)
0/4 = 0 x 100 = 0%
b)
4/4 = 1 x 100 = 100%
c)
2/4 = .5 x 100 = 50%
7.
What is the probability of the children being heterozygous?
a)
0%
b)
50%
c)
100%
d)
25%
8.
What is the probability of the children being homozygous?
a)
0%
b)
50%
c)
100%
d)
25%
9.
What is the probability of the children being homozygous?
a)
0%
b)
50%
c)
100%
d)
25%
10.
B = brown eyes b = blue eyes
How many children have blue eyes?
How many children have blue eyes?
a)
2
b)
4
c)
3
d)
0
11.
What is the probability that the children will be heterozygous?
a)
0%
b)
25%
c)
50%
d)
75%
12.
Select one answer:
B = brown eyes b = blue eyes
In the Punnet Square, the children are expected to be these genotypes.
B = brown eyes b = blue eyes
In the Punnet Square, the children are expected to be these genotypes.
a)
BB
b)
BB, Bb and bb
c)
Bb
d)
bb
13.
True or False: Tt is considered to be a genotype.
a)
true
b)
false
14.
Select the best answer: If the genotype for a trait is homozygous it is written . . . . . . .
a)
Bb
b)
Hh
c)
BB or bb
15.
If the genotype for a trait is heterozygous do you see the dominant or recessive trait?
a)
dominant
b)
recessive
c)
both traits
16.
When both alleles are recessive and the same on a gene you will see _________ trait(s)
a)
dominant and recessive
b)
recessive
c)
dominant
17.
B = brown eyes and b = blue eyes
Which color eyes are dominant?
a)
blue
b)
brown
c)
both colors
18.
F = flat nose and f = pointed nose
Which trait is recessive?
Which trait is recessive?
a)
flat nose
b)
pointed nose
c)
both traits
19.
Choose the best answer;
F = flat beak f = pointed beak
What are the genotype(s) for the flat beak phenotype?
F = flat beak f = pointed beak
What are the genotype(s) for the flat beak phenotype?
a)
ff
b)
Ff
c)
FF and Ff
20.
DNA is passed on to us from __________
a)
future young
b)
just parents
c)
future generations
d)
past generations
21.
Genetics can best be defined as
a)
The study of biology
b)
The study of archeology
c)
The study of heredity
22.
True or False:
Female = XX and Male = XY
The female cannot pass on the Y allele to her young.
Female = XX and Male = XY
The female cannot pass on the Y allele to her young.
a)
true
b)
false
23.
The human male controls the gender of his children.
(Hint: When you are male your genotype is XY. When you are female your genotype is XX)
(Hint: When you are male your genotype is XY. When you are female your genotype is XX)
a)
true
b)
false
24.
Cleft chin, chin dimple, flat nose, blue eyes are all considered to be
a)
traits
b)
genotypes
c)
homozygous recessive
d)
heterozygous dominant
25.
True or False: Traits are passed on from young to their parents.
a)
true
b)
false
26.
Select the best answer: What is a purebred?
a)
individuals that are similar and breed together
b)
individuals that are different and do not breed together
c)
individuals that are different and breed together.
27.
Punnett Squares are used to determine the __________________that young will have a particular trait.
a)
percentage or probability
b)
linear slope
c)
parental traits
28.
Homozygous recessive is
a)
when both alleles are the recessive trait.
b)
when one allele is the dominant trait.
c)
when both alleles are the dominant trait.
d)
when one allele is dominant trait and the other is recessive trait.
29.
Homozygous dominant is
a)
when one allele is the phenotype.
b)
when one allele is dominant trait and the other is dominant trait.
c)
when one allele is recessive trait and the other is dominant trait.
d)
when both alleles are the recessive trait.
30.
Females are XX and _______ are XY
a)
homozygous
b)
males
c)
chromosomes
d)
DNA
100 %
