WorksheetsGenetic 2 Review
Total questions: 48
Worksheet time: 57mins
Name
Class
Date
1.
Genotype refers to the ...
a)
physical expression of the genes
b)
the actual genetic make of the alleles
c)
whether an allele is dominant or recessive
d)
how an organism will appear
2.
Squidward has light blue skin, and his genotype for this trait is Bb. Would Squidward be considered a homozygous or heterozygous for light blue skin?
a)
homozygous
b)
heterozygous
c)
phenotype
d)
alleles
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.
Which of the following is a phenotype?
a)
BB
b)
Hetrozygous
c)
bb
d)
Blue eyes
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 .
a)
homozygous
b)
hetrozygous
c)
recessive
d)
dominant
7.
Having two different genes for a trait.
a)
phenotype
b)
homozygous
c)
heterozygous
d)
genotype
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.
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
11.
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
12.
Incomplete dominance means that the traits are
a)
both alleles
b)
dominant
c)
recessive
d)
blended
13.
Term for homozygous organisms that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
selective breeding
14.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
15.
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
16.
Which of the following genotypes is homozygous recessive?
a)
RR
b)
Rr
c)
rr
d)
None of the Above
17.
Brown (B) is dominant over white (b). Which genotype is a purebred for brown fur?
a)
BB
b)
Bb
c)
bb
d)
All of the above
18.
A cross between two tall garden pea plants produced 314 tall plants and 98 short plants. What genotypes are the parents?
a)
TT and tt
b)
TT and Tt
c)
Tt and Tt
d)
TT and TT
19.
What does a Punnett Square help you do?
a)
Determine the ratio of phenotypes
b)
Determine the ratio of genotypes
c)
Predict possible traits the offspring will have
d)
All of the above
20.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
21.
What is the genotype for this organism?
(E= 3 eyes, e= 1 eye)
(E= 3 eyes, e= 1 eye)
a)
EE
b)
Ee
c)
ee
d)
EE or Ee
22.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
23.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:
a)
all black
b)
all white
c)
all gray
d)
speckled black and white
24.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
25.
In some carnations, flower color exhibits codominance. Identify the correct genotypes for red, white, and speckled carnations.
a)
Red = RR, white = rr, speckled = Rr
b)
Red = RR, white = WW, speckled = rw
c)
Red = RR, white = ww, Speckled = Rw
d)
Red = RR, white = WW, speckled = RW
26.
What is shown in the diagram shown?
a)
DAN
b)
RAN
c)
DNA
d)
RNA
27.
Any change in the sequence of DNA is...
a)
Selective Breeding
b)
Biomedical Research
c)
Monohybrid Cross
d)
Mutation
28.
Illustration shows.
a)
Sickle cell
b)
Tumors
c)
Genetic Engeering
d)
White blood cells
29.
Which organelle is DNA usually found in?
a)
cell membrane
b)
vacuole
c)
chloroplast
d)
nucleus
30.
Sickle cell anemia originated from a __________mutation.
a)
gene
b)
phenotypic
c)
chromosomes
d)
homozygous
31.
How are mutations passed on to offspring?
a)
Any mutation that an organism acquires in its life can be passed on to the offspring through its gametes (sex cells)
b)
Only mutations that occur *in the gametes* are passed on to the offspring
c)
Mutations are not usually passed on to the offspring. A mutation stays within the original organism.
d)
Mutations are not passed to offspring. They only occur within developing embryos.
32.
When do most mutations occur?
a)
Randomly
b)
Every 2 generations
c)
Every 3 generations
d)
Scheduled
33.
Mutations happen randomly, but ____ factors can also cause mutations.
a)
Environmental
b)
Genetic
c)
Biotic
d)
Intermittent
34.
Many mutations are fixed by
a)
the body's enzymes
b)
the body's platelets
c)
the body's flexibility
d)
excercise
35.
Somatic Cells are
a)
Body Cells
b)
Sex Cells
c)
Brain Cells
d)
Muscular Cells
36.
Gamete Cells are
a)
Body Cells
b)
Sex Cells
c)
Brain Cells
d)
Muscular Cells
37.
If a mutation happens in a Somatic Cell
a)
the mutation doesn't get passed on to offspring
b)
The mutation gets passed on to offspring
c)
The mutation will harm the offspring
d)
The mutation will benefit the offspring
38.
Mutations that help organisms survive...
a)
Are more likely to be passed on
b)
Are less likely to be passed on
c)
Will disappear
d)
Will never reappear
39.
The mutation that caused Giraffe ancestors to have long necks
a)
was beneficial
b)
was harmful
c)
was neutral
40.
It is very common for yellow labs to have bad hips. This is because owners want purebred yellow labs who are good hunting dogs. This is an example of
a)
Biomedical research
b)
Selective breeding
c)
Homozygous
d)
Mutation
41.
All of the following statements are reasons for selective breeding except:
a)
To produce offspring with desirable characteristics
b)
Farmers increase their profit by improving crops
c)
To improve the quality of food products
d)
To increase migration patterns
42.
The chance that an event will occur is called?
a)
Prediction
b)
Solution
c)
Probability
d)
Punnett Squares
43.
GMO stands for
a)
Genetically modified organism
b)
Genetically made organism
c)
Generically made organ
d)
Generically modified organism
44.
The transfer of a gene from the DNA of one organism into another organism in order to produce an organism with desired traits.
a)
Genetic Engineering
b)
Mutation
c)
Selective Breeding
d)
Genome
45.
The entire collection of genes within human cells is referred to as the ______.
a)
human genome
b)
bio-medical research
c)
pedigree
d)
selective breeding
46.
Scientists have figured out a way to engineer crops that are larger and require less water to grow.
a)
Harmful
b)
Beneficial
c)
Neither
47.
Scientists genetically engineer corn to be immune to corn diseases. This is BENEFICIAL because
a)
This causes corn to be less likely to reproduce
b)
This causes corn to be less likely to survive
c)
This causes corn to be smaller
d)
This allows increased production of corn
48.
Based on the notes, how can technology help with genetic engineering?
a)
it can be used to add, or modify genes directly into living things.
b)
It can prevent disorders with a 100% success rate
c)
It can cause birth defects
d)
It has no ethical issues
100 %
