NEW
Font size
S
M
L
XL
WorksheetsGenetics & Pedigrees
Total questions: 33
Worksheet time: 28mins
Name
Class
Date
1.
the genetic makeup of an organism
a)
heterozygous
b)
punnet square
c)
genotype
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 allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
4.
B=brown eyes
b= blue eyes
Two brothers have genotypes BB and Bb for eye color.
Which statement is true about the brothers?
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
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.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
7.
If T=Tall & t=short, what is the genotypic ratio in the offspring?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
8.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
9.
Which best describes the process shown?
a)
mutation in which the DNA content of the gene is altered
b)
segregation of sister chromatids
c)
condensation and segregation of the alleles
d)
crossing-over when alleles are exchanged
10.
What is one advantage of sexual reproduction?
a)
offspring are identical to parents
b)
offspring are resistant to viruses
c)
offspring are born live, rather thna from eggs
d)
offspring inherit a wider variety of genetic information
11.
What is a phenotype?
a)
The expression of a trait; what you see.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
12.
Where, in the eukaryotic cell, is DNA located?
a)
ribosomes
b)
nucleus
c)
E.R.
d)
cytoplasm
13.
What is the percentage of offspring that have green pods?
a)
100%
b)
75%
c)
50%
d)
25%
14.
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
15.
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
16.
A human usually has _____ total chromosomes.
a)
6
b)
22
c)
4
d)
46
17.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
18.
Colorblindness is a recessive, X chromosome sex-link disorder. Cross the parents to figure out which percentage of their offspring will be colorblind.
a)
25%
b)
0%
c)
75%
d)
50%
19.
In this type of inheritance pattern, the offspring shows BOTH traits in the phenotype.
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
20.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)
sperm cells
d)
blood cells
21.
What determines gender in humans?
a)
the X and Y chromosome
b)
chromosome 21
c)
codominance
d)
epistasis
22.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
23.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
24.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
25.
In the second generation-how many people have the disease or display the physical trait?
a)
2
b)
4
c)
5
d)
6
26.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
27.
There are no carriers for Huntington's Disease- you either have it or you don't. Is Huntington's disease caused by a dominant or recessive trait?
a)
Dominant
b)
Recessive
28.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
29.
Hemophilia is a recessive sex-linked trait. If H = normal & h = has hemophilia, which genotype represents a male with hemophilia.
a)
XHY
b)
XHXh
c)
XhXh
d)
XhY
30.
What is the gender of the individual whose karyotype is seen in the image?
a)
Male
b)
Female
31.
What are pedigrees used for?
a)
To look at families
b)
To make determinations about the offspring
c)
To track traits in families
d)
Nothing
32.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
33.
What is the genotype of the father?
a)
AA
b)
aa
c)
Aa
d)
AA or aa
Reset
