WorksheetsBasic Genetics + Karyotypes
Total questions: 20
Worksheet time: 12mins
Name
Class
Date
1.
What causes trisomies and monosomies?
a)
Nondisjunction
b)
Huntington's disease
c)
Lysogenic viruses
d)
Dismemberment
2.
Tortoiseshell cats, like the one pictured, are a patchwork of red and black fur. These cats have one allele for red fur and one for black fur. Therefore, these two alleles are clearly...
a)
Incompletely dominant to each other
b)
Codominant
c)
Black must be dominant to red
d)
Linked to eye color
3.
Why is eye color in humans so complicated?
a)
It's polygenic (affected by multiple genes)
b)
It's polygenic (not affected by any genes)
c)
It's codominant (created by a combination of alleles)
d)
It's codominant (controlled by dilution)
4.
Which of the following is a gamete?
a)
Skin cell
b)
White blood cell
c)
Egg cell
d)
Hair follicle cell
5.
A sperm cell would be considered __________, because it has _______ as many chromosomes as a normal cell.
a)
Haploid, half
b)
Diploid, half
c)
Haploid, twice
d)
Diploid, twice
6.
A person with Turner syndrome has only one X chromosome. This means one of their gametes was missing a chromosome.
Which of the following is why gametes sometimes lack a complete chromosome?
Which of the following is why gametes sometimes lack a complete chromosome?
a)
Incomplete dominance
b)
Nondisjunction
c)
Inversion mutation
d)
Substitution mutation
7.
What is this biological family tree called?
a)
Dichotomous key
b)
Cladogram
c)
Circle-Square Diagram
d)
Pedigree
8.
Which of the following can a karyotype not tell you?
a)
Whether someone has double Y syndrome (XYY)
b)
Whether someone has a monosomy
c)
What gender someone is
d)
Whether someone is colorblind
9.
Who was Gregor Mendel?
a)
A friar who studied inheritance in pea plants
b)
A friar who studied meiosis in fire ants
c)
An American who studied disease resistance in mice
d)
An American who studied the structure of DNA
10.
A chestnut colored horse and a cream horse mate and have baby horses. All of the babies are palomino - which is a color in-between chestnut and cream.
This color gene is probably...
This color gene is probably...
a)
Incompletely dominant
b)
Codominant
c)
Sex-linked
d)
Dependent on the father's genes more
11.
Squirrels have a lot of important genes. Which of the following sets of squirrel genes is completely heterozygous?
a)
AaGgYyWw
b)
AAGGYYWW
c)
aaggyyww
d)
AaggYyww
12.
Rainbow horns are dominant to yellow horns in unicorns. If a homozygous dominant unicorn mates with a yellow horned unicorn, what percent of the baby unicorns will have rainbow horns?
a)
100%
b)
50%
c)
25%
d)
0%
13.
Freckles are (effectively) a dominant trait. A man with freckles has a child with a woman who also has freckles.
However, the kid does not have freckles. What is a reasonable conclusion?
However, the kid does not have freckles. What is a reasonable conclusion?
a)
It's not his kid
b)
Both parents are heterozygous for freckles
c)
The mother must be homozygous recessive for freckles
d)
There's a monosomy of the freckle chromosome
14.
In a pedigree, what does a circle represent?
a)
A female
b)
A male
c)
Empty promises
d)
Adopted cat children
15.
The ultimate purpose of crossing over and recombination is...
a)
... there is no point
b)
... to increase variety in the gametes
c)
... to standardize the genes between gametes
d)
... to increase the chance of self-cloning
16.
What is it called when two non-homologous chromosomes recombine with each other?
a)
Translocation
b)
Inversion
c)
Substitution mutation
d)
Nondisjunction
17.
Homologous chromosomes will have similar genes on them. However, they could have different versions of these genes. These different versions are called...
a)
Mutants
b)
Recombinants
c)
Alleles
d)
Mendel's code
18.
Meiosis goes through _______________.
a)
PMAT twice.
b)
PMAT four times.
c)
Nondisjunction twice.
d)
Nondisjunction four times.
19.
When you change only one nucleotide on a chromosome, it's called a __________ mutation.
a)
Point
b)
Inversion
c)
Translocation
d)
Duplication
20.
Turtle shell color and eye color are controlled by two separate genes. If two turtles mate and we are solving for both of these two traits, then this is a...
a)
Dihybrid cross
b)
Monohybrid cross
c)
Impossible cross
d)
Nonhybrid cross
100 %
