WorksheetsGenetics Basic Bio
Total questions: 38
Worksheet time: 19mins
There are two genes (letters) for most traits
True
False
Body cells contain pairs of chromosomes (1 from mom and 1 from dad).
True
False
A gene is a small piece of DNA that codes for 1 trait.
True
False
There are 23 chromosomes in a normal human egg cell.
True
False
Pure is another word for heterozygous.
True
False
Human females have XY sex chromosomes and human males have XX sex chromosomes.
True
False
Expected results can be predicted using a punnett square.
True
False
A skin cell is considered to be a body cell.
True
False
DNA makes up genes and genes make up chromosomes. (think smallest to biggest)
True
False
Having one dominant gene and one recessive gene for a trait.
Homozygous
Heterozygous
Genotype
Phenotype
In the genotype "Nn", what kind of gene is the "N"?
Homozygous
Heterozygous
Dominant
Recessive
The words used to describe what an organism looks like.
Dominant
Recessive
Genotype
Phenotype
The letters used to symbolize the two genes that an organism has for a trait.
Homozygous
Heterozygous
Genotype
Phenotype
Having two of the same genes for a trait.
Homozygous
Heterozygous
Expected Results
Observed Results
The results of a punnett square give us
expected results
observed results
genotype
phenotype
The results from a real cross in which we can actually see and count the traits among living organisms
Expected Results
Observed Results
Homozygous
Heterozygous
The gen that gets masked (hidden) and will only be visible if the organism has two of them for the trait is called the _______ gene.
Homozygous
Heterozygous
Dominant
Recessive
RR, ss, TT are all examples of this type of genotype
Homozygous
Heterozygous
Dominant
Recessive
In the genotype, "Nn", what kind of gene is the "n"?
Homozygous
Heterozygous
Dominant
Recessive
Each sex cell has how many chromosomes of each kind?
One
Two
Three
Four
In humans, thick lips are incompletely dominant over thin lips. A man who is heterozygous for the trait would have _______ lips.
Thick
Thin
Normal (medium thickness)
One thick lip and one thin lip
A picture of chromosomes arranged in order from largest to smallest that is used to see if a person as the correct number of chromosomes and to make sure there are no missing or extra parts to the chromosomes is called a(n) ____________.
amniocentesis
ultrasound
karyotype
micrograph
The Y chromosome is
bigger
smaller
longer because it carries more genes
not important because it doesn't have any information
A person with blood type A could have which of the following genotypes?
AA
AB
OO
BO
In humans, a widow's peak is dominant to a straight hair line. Which letter should be used to represent the widow's peak?
W (capital W)
w (little w)
S (capital S)
s (little s)
Who is considered the "father of genetics"?
Charles Darwin
John LaMarck
Robert Hooke
Gregor Mendel
In humans, free earlobes are dominant to attached earlobes. When both parents have attached ear lobes, you could expect the children to be
25% with free earlobes
50% with free earlobes
75% with free earlobes
None with free earlobes
Blood type is passed on from parents to offspring by what type of inheritance?
true dominance
incomplete dominance
multiple alleles
sex-linked traits
What blood type is the universal donor?
Type A
Type B
Type AB
Type O
What blood type is the universal recipient?
Type A
Type B
Type AB
Type O
In snapdragons, the red flowers are incompletely dominant to the white flowers. The intermediate condition results in a pink flower. Which of the following keys is correct?
RR= Red, Rr= Pink, rr= White
R= Red, P= Pink, W= White
RR= Red, RW= Pink, WW= White
If a person is heterozygous for blood type A, what is the genotype for their blood?
AA
AO
AB
BO
If a person has blood type O, which of the following is correct for the genotype for type O?
AA
BB
OO
AB
Colorblindness is always sex-linked and recessive. Which of the following keys is correct?
N= normal, n= colorblind
XN = Normal, Xn= colorblind
X= Normal, Y= colorblind
Look at the karyotype above. What is wrong with this person?
They have 3 of chromosome #21
They have three sex chromosomes
They are missing a Y chromosome
There is nothing wrong.
In the karyotype above, the person has 3 of chromosome #21. What is the name of the genetic disorder?
Down's Syndrome
Turner's Syndrome
Klinefelter's Syndrome
Autism
In the karyotype above, what is the sex of the baby?
Male
Female
In humans, curly hair is incompletely dominant to straight hair. The intermediate (middle) condition causes wavy hair. Which of the following is correct for the key?
HH=Curly, Hh=Wavy, hh= Straight
C= Curly, W= Wavy, S= Straight
