WorksheetsGenetic Unit Review
Total questions: 55
Worksheet time: 2hrs 38mins
Brown eyes is dominant to blue eyes. Which genotype would give brown eyes?
BB
Bb
bb
BB and Bb
Which statement correctly shows how genes and chromosomes are related?
chromosomes are made of DNA, but genes are not
chromosomes are found on genes
genes are located inside the nucleus and chromosomes are not
genes are found on chromosomes
What is the probability that the offspring will have recessive blue eyes?
1/4
2/4
3/4
4/4
Which of the following is a phenotype that would match this punnett square?
BB
brown eyes
bb
1/4
The corn we eat today is larger and has more kernels than the corn people first grew thousands of years ago. Which process is most likely responsible for the changes that have occurred?
mitosis
succession
direct harvesting
selective breeding
Selective breeding is a genetic engineering technique that creates organisms with
the same genes
desirable traits
50% of the same genes as the parent
25% of the same genes as the parent
What is genetic technology?
practices/techniques used to alter/manipulate the genetic material of an organism to produce a specific trait
practices/techniques used to determine the likelihood of contracting a particular disease
Which statement correctly describes a difference between asexual and sexual reproduction?
Sexual reproduction only happens in animals, while asexual reproduction only happens in plants.
Sexual reproduction only happens in prokaryotes, while asexual reproduction only happens in eukaryotes.
Sexual reproduction requires two parents to make a genetically unique offspring, while asexual reproduction requires only one parent to produce a genetically identical offspring.
Sexual reproduction only occurs in cells without a nucleus, while asexual reproduction occurs in cells with a nucleus.
What is a change in the DNA of a gene or chromosome?
Allele
Mutation
Homozygous
Trait
Use the Punnett Square above to identify the phenotype's of the offspring. Red petals are dominant over white petals.
25% Red, 50 % red and white, 25 % white
RR, Rr, rr
75 % Red and 25 % white
25 % Red, 50 % pink, 25 % white
Two tall pea plants are crossed and their seeds are planted in a sunny spot in the garden. They received the same amount of water, are exposed to the same temperatures and soil conditions. At the end of the growing season you notice that 75% of the plants are tall and 25% of the plants are short. Which of the following best explains these results?
The temperatures outside varied over the growing season which caused some plants to not grow as tall.
The amount of sunlight the plants received was different, thus some did not get enough light to grow tall.
The growing conditions of the plants were different, thus some did not get the resources they needed like fertilizer
The plants received different genetic factors from the parents, some received the tall factor and some the short factor.
Which of the following is a homozygous genotype?
Bb
Tt
bb
Ff
Changes in DNA are known as mutations and can sometimes produce beneficial changes in populations. A mutant form of the normally light-colored peppered moth is dark-colored. The dark-colored moth blends in with soot-covered trees in heavily polluted areas. Why would the dark-colored mutation be beneficial in a polluted area?
They have a longer life span than light-colored moths.
They cannot be seen as well by predators.
They taste bad to most of their predators.
They produce more young than do light-colored moths.
When a genotype is heterozygous, what phenotype will result? *Select more than one.*
The phenotype of the dominant allele.
The phenotype of the recessive allele.
The phenotype represented by the uppercase letter.
The phenotype represented by the lowercase letter.
Different versions of genes are called _____________________.
alleles
homozygous
heterozygous
trait
In the punnett square below, what belongs in the missing square
Any ecosystem factor that influences living organisms
adaptation
environmental factors
genetic factors
growth
organism
Result from specific alleles carried by an individual
adaptation
environmental factors
genetic factors
growth
organism
_________ factors are traits that animals inherit that either positively or negatively influence their growth.
genetic
environmental
biotic
abiotic
_________ factors that influence the growth of organisms can be biotic or abiotic.
genetic
environmental
biotic
abiotic
What point mutation adds one base?
Substitution
Deletion
Insertion
Which of the following environmental factors caused the changes in the light and dark-colored peppered moth populations in the 1850's?
water pollution
smoke and soot in the air
acid rain
erosion
A factor from an organism's surroundings that influences it in some way
Environmental factor
Genetic factor
Limiting factor
system
Genes passed (DNA) from parent to offspring that determine characteristics for success
Genetic factor
Environmental factor
Limiting Factor
System
A person deciding to workout, lift weights, and become buffed is an example of a(n)
Genetic factor
Environmental factor
The amount of humidity in an area is an example of a(n)
Genetic factor
Environmental factor
The weight and size of a seed is an example of a(n)
Genetic factor
Environmental factor
TRUE or FALSE?
Genetic factors, such as drought, light, and carbon dioxide, can affect a plant's growth.
TRUE
FALSE
The difference between genotype and phenotype is :
Genotype shows the combination of alleles that provides the genes for a trait, while phenotype is the expression of the trait, what it will look like.
Phenotype shows the combination of alleles that provides the genes for a trait, while genotype is the expression of the trait, what it will look like.
Most gene mutations are _____.
beneficial; they improve an organism's fitness for its environment.
neutral; they do not affect an organism's fitness for its environment.
unfavorable; they tend to make organisms less fit for their environment.
none of these.
